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

   1 /*
   2  * Sone - Core.java - Copyright © 2010–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import static com.google.common.base.Preconditions.checkArgument;
  21 import static com.google.common.base.Preconditions.checkNotNull;
  22
  23 import java.net.MalformedURLException;
  24 import java.util.ArrayList;
  25 import java.util.Collection;
  26 import java.util.Collections;
  27 import java.util.HashMap;
  28 import java.util.HashSet;
  29 import java.util.List;
  30 import java.util.Map;
  31 import java.util.Map.Entry;
  32 import java.util.Set;
  33 import java.util.concurrent.ExecutorService;
  34 import java.util.concurrent.Executors;
  35 import java.util.concurrent.ScheduledExecutorService;
  36 import java.util.concurrent.TimeUnit;
  37 import java.util.logging.Level;
  38 import java.util.logging.Logger;
  39
  40 import net.pterodactylus.sone.core.Options.DefaultOption;
  41 import net.pterodactylus.sone.core.Options.Option;
  42 import net.pterodactylus.sone.core.Options.OptionWatcher;
  43 import net.pterodactylus.sone.core.event.ImageInsertFinishedEvent;
  44 import net.pterodactylus.sone.core.event.MarkPostKnownEvent;
  45 import net.pterodactylus.sone.core.event.MarkPostReplyKnownEvent;
  46 import net.pterodactylus.sone.core.event.MarkSoneKnownEvent;
  47 import net.pterodactylus.sone.core.event.NewPostFoundEvent;
  48 import net.pterodactylus.sone.core.event.NewPostReplyFoundEvent;
  49 import net.pterodactylus.sone.core.event.NewSoneFoundEvent;
  50 import net.pterodactylus.sone.core.event.PostRemovedEvent;
  51 import net.pterodactylus.sone.core.event.PostReplyRemovedEvent;
  52 import net.pterodactylus.sone.core.event.SoneLockedEvent;
  53 import net.pterodactylus.sone.core.event.SoneRemovedEvent;
  54 import net.pterodactylus.sone.core.event.SoneUnlockedEvent;
  55 import net.pterodactylus.sone.data.Album;
  56 import net.pterodactylus.sone.data.Client;
  57 import net.pterodactylus.sone.data.Image;
  58 import net.pterodactylus.sone.data.Post;
  59 import net.pterodactylus.sone.data.PostReply;
  60 import net.pterodactylus.sone.data.Profile;
  61 import net.pterodactylus.sone.data.Profile.Field;
  62 import net.pterodactylus.sone.data.Reply;
  63 import net.pterodactylus.sone.data.Sone;
  64 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  65 import net.pterodactylus.sone.data.Sone.SoneStatus;
  66 import net.pterodactylus.sone.database.PostBuilder;
  67 import net.pterodactylus.sone.database.PostBuilderFactory;
  68 import net.pterodactylus.sone.database.PostProvider;
  69 import net.pterodactylus.sone.database.PostReplyBuilder;
  70 import net.pterodactylus.sone.database.PostReplyBuilderFactory;
  71 import net.pterodactylus.sone.database.PostReplyProvider;
  72 import net.pterodactylus.sone.database.SoneProvider;
  73 import net.pterodactylus.sone.data.TemporaryImage;
  74 import net.pterodactylus.sone.fcp.FcpInterface;
  75 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
  76 import net.pterodactylus.sone.freenet.wot.Identity;
  77 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  78 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  79 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  81 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  82 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  83 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  84 import net.pterodactylus.sone.main.SonePlugin;
  85 import net.pterodactylus.sone.utils.IntegerRangePredicate;
  86 import net.pterodactylus.util.config.Configuration;
  87 import net.pterodactylus.util.config.ConfigurationException;
  88 import net.pterodactylus.util.logging.Logging;
  89 import net.pterodactylus.util.number.Numbers;
  90 import net.pterodactylus.util.service.AbstractService;
  91 import net.pterodactylus.util.thread.NamedThreadFactory;
  92
  93 import com.google.common.base.Function;
  94 import com.google.common.base.Optional;
  95 import com.google.common.base.Predicate;
  96 import com.google.common.base.Predicates;
  97 import com.google.common.collect.Collections2;
  98 import com.google.common.collect.FluentIterable;
  99 import com.google.common.collect.Ordering;
 100 import com.google.common.eventbus.EventBus;
 101 import com.google.common.eventbus.Subscribe;
 102 import com.google.inject.Inject;
 103
 104 import freenet.keys.FreenetURI;
 105
 106 /**
 107  * The Sone core.
 108  *
 109  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 110  */
 111 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 112
 113         /** The logger. */
 114         private static final Logger logger = Logging.getLogger(Core.class);
 115
 116         /** The start time. */
 117         private final long startupTime = System.currentTimeMillis();
 118
 119         /** The options. */
 120         private final Options options = new Options();
 121
 122         /** The preferences. */
 123         private final Preferences preferences = new Preferences(options);
 124
 125         /** The event bus. */
 126         private final EventBus eventBus;
 127
 128         /** The configuration. */
 129         private Configuration configuration;
 130
 131         /** Whether we’re currently saving the configuration. */
 132         private boolean storingConfiguration = false;
 133
 134         /** The identity manager. */
 135         private final IdentityManager identityManager;
 136
 137         /** Interface to freenet. */
 138         private final FreenetInterface freenetInterface;
 139
 140         /** The Sone downloader. */
 141         private final SoneDownloader soneDownloader;
 142
 143         /** The image inserter. */
 144         private final ImageInserter imageInserter;
 145
 146         /** Sone downloader thread-pool. */
 147         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 148
 149         /** The update checker. */
 150         private final UpdateChecker updateChecker;
 151
 152         /** The trust updater. */
 153         private final WebOfTrustUpdater webOfTrustUpdater;
 154
 155         /** The FCP interface. */
 156         private volatile FcpInterface fcpInterface;
 157
 158         /** The times Sones were followed. */
 159         private final Map<String, Long> soneFollowingTimes = new HashMap<String, Long>();
 160
 161         /** Locked local Sones. */
 162         /* synchronize on itself. */
 163         private final Set<Sone> lockedSones = new HashSet<Sone>();
 164
 165         /** Sone inserters. */
 166         /* synchronize access on this on sones. */
 167         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 168
 169         /** Sone rescuers. */
 170         /* synchronize access on this on sones. */
 171         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 172
 173         /** All Sones. */
 174         /* synchronize access on this on itself. */
 175         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 176
 177         /** All known Sones. */
 178         private final Set<String> knownSones = new HashSet<String>();
 179
 180         /** The post builder. */
 181         private final PostBuilderFactory postBuilderFactory;
 182
 183         /** All posts. */
 184         private final Map<String, Post> posts = new HashMap<String, Post>();
 185
 186         /** All known posts. */
 187         private final Set<String> knownPosts = new HashSet<String>();
 188
 189         /** The post reply builder factory. */
 190         private final PostReplyBuilderFactory postReplyBuilderFactory;
 191
 192         /** All replies. */
 193         private final Map<String, PostReply> replies = new HashMap<String, PostReply>();
 194
 195         /** All known replies. */
 196         private final Set<String> knownReplies = new HashSet<String>();
 197
 198         /** All bookmarked posts. */
 199         /* synchronize access on itself. */
 200         private final Set<String> bookmarkedPosts = new HashSet<String>();
 201
 202         /** Trusted identities, sorted by own identities. */
 203         private final Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 204
 205         /** All known albums. */
 206         private final Map<String, Album> albums = new HashMap<String, Album>();
 207
 208         /** All known images. */
 209         private final Map<String, Image> images = new HashMap<String, Image>();
 210
 211         /** All temporary images. */
 212         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 213
 214         /** Ticker for threads that mark own elements as known. */
 215         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 216
 217         /** The time the configuration was last touched. */
 218         private volatile long lastConfigurationUpdate;
 219
 220         /**
 221          * Creates a new core.
 222          *
 223          * @param configuration
 224          *            The configuration of the core
 225          * @param freenetInterface
 226          *            The freenet interface
 227          * @param identityManager
 228          *            The identity manager
 229          * @param webOfTrustUpdater
 230          *            The WebOfTrust updater
 231          * @param eventBus
 232          *            The event bus
 233          * @param postBuilderFactory
 234          *            The post builder
 235          * @param postReplyBuilderFactory
 236          *            The post reply builder factory
 237          */
 238         @Inject
 239         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, PostBuilderFactory postBuilderFactory, PostReplyBuilderFactory postReplyBuilderFactory) {
 240                 super("Sone Core");
 241                 this.configuration = configuration;
 242                 this.freenetInterface = freenetInterface;
 243                 this.identityManager = identityManager;
 244                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 245                 this.imageInserter = new ImageInserter(freenetInterface);
 246                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 247                 this.webOfTrustUpdater = webOfTrustUpdater;
 248                 this.eventBus = eventBus;
 249                 this.postBuilderFactory = postBuilderFactory;
 250                 this.postReplyBuilderFactory = postReplyBuilderFactory;
 251         }
 252
 253         //
 254         // ACCESSORS
 255         //
 256
 257         /**
 258          * Returns the time Sone was started.
 259          *
 260          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 261          */
 262         public long getStartupTime() {
 263                 return startupTime;
 264         }
 265
 266         /**
 267          * Sets the configuration to use. This will automatically save the current
 268          * configuration to the given configuration.
 269          *
 270          * @param configuration
 271          *            The new configuration to use
 272          */
 273         public void setConfiguration(Configuration configuration) {
 274                 this.configuration = configuration;
 275                 touchConfiguration();
 276         }
 277
 278         /**
 279          * Returns the options used by the core.
 280          *
 281          * @return The options of the core
 282          */
 283         public Preferences getPreferences() {
 284                 return preferences;
 285         }
 286
 287         /**
 288          * Returns the identity manager used by the core.
 289          *
 290          * @return The identity manager
 291          */
 292         public IdentityManager getIdentityManager() {
 293                 return identityManager;
 294         }
 295
 296         /**
 297          * Returns the update checker.
 298          *
 299          * @return The update checker
 300          */
 301         public UpdateChecker getUpdateChecker() {
 302                 return updateChecker;
 303         }
 304
 305         /**
 306          * Sets the FCP interface to use.
 307          *
 308          * @param fcpInterface
 309          *            The FCP interface to use
 310          */
 311         public void setFcpInterface(FcpInterface fcpInterface) {
 312                 this.fcpInterface = fcpInterface;
 313         }
 314
 315         /**
 316          * Returns the Sone rescuer for the given local Sone.
 317          *
 318          * @param sone
 319          *            The local Sone to get the rescuer for
 320          * @return The Sone rescuer for the given Sone
 321          */
 322         public SoneRescuer getSoneRescuer(Sone sone) {
 323                 checkNotNull(sone, "sone must not be null");
 324                 checkArgument(sone.isLocal(), "sone must be local");
 325                 synchronized (sones) {
 326                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 327                         if (soneRescuer == null) {
 328                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 329                                 soneRescuers.put(sone, soneRescuer);
 330                                 soneRescuer.start();
 331                         }
 332                         return soneRescuer;
 333                 }
 334         }
 335
 336         /**
 337          * Returns whether the given Sone is currently locked.
 338          *
 339          * @param sone
 340          *            The sone to check
 341          * @return {@code true} if the Sone is locked, {@code false} if it is not
 342          */
 343         public boolean isLocked(Sone sone) {
 344                 synchronized (lockedSones) {
 345                         return lockedSones.contains(sone);
 346                 }
 347         }
 348
 349         /**
 350          * Returns all Sones, remote and local.
 351          *
 352          * @return All Sones
 353          */
 354         public Set<Sone> getSones() {
 355                 return new HashSet<Sone>(sones.values());
 356         }
 357
 358         /**
 359          * Returns the Sone with the given ID, regardless whether it’s local or
 360          * remote.
 361          *
 362          * @param id
 363          *            The ID of the Sone to get
 364          * @return The Sone with the given ID, or {@code null} if there is no such
 365          *         Sone
 366          */
 367         @Override
 368         public Sone getSone(String id) {
 369                 synchronized (sones) {
 370                         return sones.get(id);
 371                 }
 372         }
 373
 374         /**
 375          * Checks whether the core knows a Sone with the given ID.
 376          *
 377          * @param id
 378          *            The ID of the Sone
 379          * @return {@code true} if there is a Sone with the given ID, {@code false}
 380          *         otherwise
 381          */
 382         public boolean hasSone(String id) {
 383                 synchronized (sones) {
 384                         return sones.containsKey(id);
 385                 }
 386         }
 387
 388         /**
 389          * Returns all local Sones.
 390          *
 391          * @return All local Sones
 392          */
 393         public Collection<Sone> getLocalSones() {
 394                 synchronized (sones) {
 395                         return Collections2.filter(sones.values(), new Predicate<Sone>() {
 396
 397                                 @Override
 398                                 public boolean apply(Sone sone) {
 399                                         return sone.isLocal();
 400                                 }
 401                         });
 402                 }
 403         }
 404
 405         /**
 406          * Returns the local Sone with the given ID, optionally creating a new Sone.
 407          *
 408          * @param id
 409          *            The ID of the Sone
 410          * @param create
 411          *            {@code true} to create a new Sone if none exists,
 412          *            {@code false} to return null if none exists
 413          * @return The Sone with the given ID, or {@code null}
 414          */
 415         public Sone getLocalSone(String id, boolean create) {
 416                 synchronized (sones) {
 417                         Sone sone = sones.get(id);
 418                         if ((sone == null) && create) {
 419                                 sone = new Sone(id, true);
 420                                 sones.put(id, sone);
 421                         }
 422                         if ((sone != null) && !sone.isLocal()) {
 423                                 sone = new Sone(id, true);
 424                                 sones.put(id, sone);
 425                         }
 426                         return sone;
 427                 }
 428         }
 429
 430         /**
 431          * Returns all remote Sones.
 432          *
 433          * @return All remote Sones
 434          */
 435         public Collection<Sone> getRemoteSones() {
 436                 synchronized (sones) {
 437                         return Collections2.filter(sones.values(), new Predicate<Sone>() {
 438
 439                                 @Override
 440                                 public boolean apply(Sone sone) {
 441                                         return !sone.isLocal();
 442                                 }
 443                         });
 444                 }
 445         }
 446
 447         /**
 448          * Returns the remote Sone with the given ID.
 449          *
 450          * @param id
 451          *            The ID of the remote Sone to get
 452          * @param create
 453          *            {@code true} to always create a Sone, {@code false} to return
 454          *            {@code null} if no Sone with the given ID exists
 455          * @return The Sone with the given ID
 456          */
 457         public Sone getRemoteSone(String id, boolean create) {
 458                 synchronized (sones) {
 459                         Sone sone = sones.get(id);
 460                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 461                                 sone = new Sone(id, false);
 462                                 sones.put(id, sone);
 463                         }
 464                         return sone;
 465                 }
 466         }
 467
 468         /**
 469          * Returns whether the given Sone has been modified.
 470          *
 471          * @param sone
 472          *            The Sone to check for modifications
 473          * @return {@code true} if a modification has been detected in the Sone,
 474          *         {@code false} otherwise
 475          */
 476         public boolean isModifiedSone(Sone sone) {
 477                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 478         }
 479
 480         /**
 481          * Returns the time when the given was first followed by any local Sone.
 482          *
 483          * @param sone
 484          *            The Sone to get the time for
 485          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 486          *         been followed, or {@link Long#MAX_VALUE}
 487          */
 488         public long getSoneFollowingTime(Sone sone) {
 489                 synchronized (soneFollowingTimes) {
 490                         return Optional.fromNullable(soneFollowingTimes.get(sone.getId())).or(Long.MAX_VALUE);
 491                 }
 492         }
 493
 494         /**
 495          * Returns whether the target Sone is trusted by the origin Sone.
 496          *
 497          * @param origin
 498          *            The origin Sone
 499          * @param target
 500          *            The target Sone
 501          * @return {@code true} if the target Sone is trusted by the origin Sone
 502          */
 503         public boolean isSoneTrusted(Sone origin, Sone target) {
 504                 checkNotNull(origin, "origin must not be null");
 505                 checkNotNull(target, "target must not be null");
 506                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin’s identity must be an OwnIdentity");
 507                 return trustedIdentities.containsKey(origin.getIdentity()) && trustedIdentities.get(origin.getIdentity()).contains(target.getIdentity());
 508         }
 509
 510         /**
 511          * Returns a post builder.
 512          *
 513          * @return A new post builder
 514          */
 515         public PostBuilder postBuilder() {
 516                 return postBuilderFactory.newPostBuilder();
 517         }
 518
 519         /**
 520          * {@inheritDoc}
 521          */
 522         @Override
 523         public Optional<Post> getPost(String postId) {
 524                 synchronized (posts) {
 525                         return Optional.fromNullable(posts.get(postId));
 526                 }
 527         }
 528
 529         /**
 530          * {@inheritDoc}
 531          */
 532         @Override
 533         public Collection<Post> getDirectedPosts(final String recipientId) {
 534                 checkNotNull(recipientId, "recipient must not be null");
 535                 synchronized (posts) {
 536                         return Collections2.filter(posts.values(), new Predicate<Post>() {
 537
 538                                 @Override
 539                                 public boolean apply(Post post) {
 540                                         return (post.getRecipient() != null) && (post.getRecipient().getId().equals(recipientId));
 541                                 }
 542                         });
 543                 }
 544         }
 545         /**
 546          * Returns a post reply builder.
 547          *
 548          * @return A new post reply builder
 549          */
 550         public PostReplyBuilder postReplyBuilder() {
 551                 return postReplyBuilderFactory.newPostReplyBuilder();
 552         }
 553
 554         /**
 555          * {@inheritDoc}
 556          */
 557         @Override
 558         public Optional<PostReply> getPostReply(String replyId) {
 559                 synchronized (replies) {
 560                         return Optional.fromNullable(replies.get(replyId));
 561                 }
 562         }
 563
 564         /**
 565          * {@inheritDoc}
 566          */
 567         @Override
 568         public List<PostReply> getReplies(final Post post) {
 569                 return Ordering.from(Reply.TIME_COMPARATOR).sortedCopy(FluentIterable.from(getSones()).transformAndConcat(new Function<Sone, Iterable<PostReply>>() {
 570
 571                         @Override
 572                         public Iterable<PostReply> apply(Sone sone) {
 573                                 return sone.getReplies();
 574                         }
 575                 }).filter(new Predicate<PostReply>() {
 576
 577                         @Override
 578                         public boolean apply(PostReply reply) {
 579                                 return post.getId().equals(reply.getPostId());
 580                         }
 581                 }));
 582         }
 583
 584         /**
 585          * Returns all Sones that have liked the given post.
 586          *
 587          * @param post
 588          *            The post to get the liking Sones for
 589          * @return The Sones that like the given post
 590          */
 591         public Set<Sone> getLikes(Post post) {
 592                 Set<Sone> sones = new HashSet<Sone>();
 593                 for (Sone sone : getSones()) {
 594                         if (sone.getLikedPostIds().contains(post.getId())) {
 595                                 sones.add(sone);
 596                         }
 597                 }
 598                 return sones;
 599         }
 600
 601         /**
 602          * Returns all Sones that have liked the given reply.
 603          *
 604          * @param reply
 605          *            The reply to get the liking Sones for
 606          * @return The Sones that like the given reply
 607          */
 608         public Set<Sone> getLikes(PostReply reply) {
 609                 Set<Sone> sones = new HashSet<Sone>();
 610                 for (Sone sone : getSones()) {
 611                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 612                                 sones.add(sone);
 613                         }
 614                 }
 615                 return sones;
 616         }
 617
 618         /**
 619          * Returns whether the given post is bookmarked.
 620          *
 621          * @param post
 622          *            The post to check
 623          * @return {@code true} if the given post is bookmarked, {@code false}
 624          *         otherwise
 625          */
 626         public boolean isBookmarked(Post post) {
 627                 return isPostBookmarked(post.getId());
 628         }
 629
 630         /**
 631          * Returns whether the post with the given ID is bookmarked.
 632          *
 633          * @param id
 634          *            The ID of the post to check
 635          * @return {@code true} if the post with the given ID is bookmarked,
 636          *         {@code false} otherwise
 637          */
 638         public boolean isPostBookmarked(String id) {
 639                 synchronized (bookmarkedPosts) {
 640                         return bookmarkedPosts.contains(id);
 641                 }
 642         }
 643
 644         /**
 645          * Returns all currently known bookmarked posts.
 646          *
 647          * @return All bookmarked posts
 648          */
 649         public Set<Post> getBookmarkedPosts() {
 650                 Set<Post> posts = new HashSet<Post>();
 651                 synchronized (bookmarkedPosts) {
 652                         for (String bookmarkedPostId : bookmarkedPosts) {
 653                                 Optional<Post> post = getPost(bookmarkedPostId);
 654                                 if (!post.isPresent()) {
 655                                         posts.add(post.get());
 656                                 }
 657                         }
 658                 }
 659                 return posts;
 660         }
 661
 662         /**
 663          * Returns the album with the given ID, creating a new album if no album
 664          * with the given ID can be found.
 665          *
 666          * @param albumId
 667          *            The ID of the album
 668          * @return The album with the given ID
 669          */
 670         public Album getAlbum(String albumId) {
 671                 return getAlbum(albumId, true);
 672         }
 673
 674         /**
 675          * Returns the album with the given ID, optionally creating a new album if
 676          * an album with the given ID can not be found.
 677          *
 678          * @param albumId
 679          *            The ID of the album
 680          * @param create
 681          *            {@code true} to create a new album if none exists for the
 682          *            given ID
 683          * @return The album with the given ID, or {@code null} if no album with the
 684          *         given ID exists and {@code create} is {@code false}
 685          */
 686         public Album getAlbum(String albumId, boolean create) {
 687                 synchronized (albums) {
 688                         Album album = albums.get(albumId);
 689                         if (create && (album == null)) {
 690                                 album = new Album(albumId);
 691                                 albums.put(albumId, album);
 692                         }
 693                         return album;
 694                 }
 695         }
 696
 697         /**
 698          * Returns the image with the given ID, creating it if necessary.
 699          *
 700          * @param imageId
 701          *            The ID of the image
 702          * @return The image with the given ID
 703          */
 704         public Image getImage(String imageId) {
 705                 return getImage(imageId, true);
 706         }
 707
 708         /**
 709          * Returns the image with the given ID, optionally creating it if it does
 710          * not exist.
 711          *
 712          * @param imageId
 713          *            The ID of the image
 714          * @param create
 715          *            {@code true} to create an image if none exists with the given
 716          *            ID
 717          * @return The image with the given ID, or {@code null} if none exists and
 718          *         none was created
 719          */
 720         public Image getImage(String imageId, boolean create) {
 721                 synchronized (images) {
 722                         Image image = images.get(imageId);
 723                         if (create && (image == null)) {
 724                                 image = new Image(imageId);
 725                                 images.put(imageId, image);
 726                         }
 727                         return image;
 728                 }
 729         }
 730
 731         /**
 732          * Returns the temporary image with the given ID.
 733          *
 734          * @param imageId
 735          *            The ID of the temporary image
 736          * @return The temporary image, or {@code null} if there is no temporary
 737          *         image with the given ID
 738          */
 739         public TemporaryImage getTemporaryImage(String imageId) {
 740                 synchronized (temporaryImages) {
 741                         return temporaryImages.get(imageId);
 742                 }
 743         }
 744
 745         //
 746         // ACTIONS
 747         //
 748
 749         /**
 750          * Locks the given Sone. A locked Sone will not be inserted by
 751          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 752          * again.
 753          *
 754          * @param sone
 755          *            The sone to lock
 756          */
 757         public void lockSone(Sone sone) {
 758                 synchronized (lockedSones) {
 759                         if (lockedSones.add(sone)) {
 760                                 eventBus.post(new SoneLockedEvent(sone));
 761                         }
 762                 }
 763         }
 764
 765         /**
 766          * Unlocks the given Sone.
 767          *
 768          * @see #lockSone(Sone)
 769          * @param sone
 770          *            The sone to unlock
 771          */
 772         public void unlockSone(Sone sone) {
 773                 synchronized (lockedSones) {
 774                         if (lockedSones.remove(sone)) {
 775                                 eventBus.post(new SoneUnlockedEvent(sone));
 776                         }
 777                 }
 778         }
 779
 780         /**
 781          * Adds a local Sone from the given own identity.
 782          *
 783          * @param ownIdentity
 784          *            The own identity to create a Sone from
 785          * @return The added (or already existing) Sone
 786          */
 787         public Sone addLocalSone(OwnIdentity ownIdentity) {
 788                 if (ownIdentity == null) {
 789                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 790                         return null;
 791                 }
 792                 synchronized (sones) {
 793                         final Sone sone;
 794                         try {
 795                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 796                         } catch (MalformedURLException mue1) {
 797                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 798                                 return null;
 799                         }
 800                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 801                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 802                         sone.setKnown(true);
 803                         /* TODO - load posts ’n stuff */
 804                         sones.put(ownIdentity.getId(), sone);
 805                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 806                         soneInserters.put(sone, soneInserter);
 807                         sone.setStatus(SoneStatus.idle);
 808                         loadSone(sone);
 809                         soneInserter.start();
 810                         return sone;
 811                 }
 812         }
 813
 814         /**
 815          * Creates a new Sone for the given own identity.
 816          *
 817          * @param ownIdentity
 818          *            The own identity to create a Sone for
 819          * @return The created Sone
 820          */
 821         public Sone createSone(OwnIdentity ownIdentity) {
 822                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 823                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 824                         return null;
 825                 }
 826                 Sone sone = addLocalSone(ownIdentity);
 827                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 828                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 829                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 830                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 831                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 832                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 833
 834                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 835                 touchConfiguration();
 836                 return sone;
 837         }
 838
 839         /**
 840          * Adds the Sone of the given identity.
 841          *
 842          * @param identity
 843          *            The identity whose Sone to add
 844          * @return The added or already existing Sone
 845          */
 846         public Sone addRemoteSone(Identity identity) {
 847                 if (identity == null) {
 848                         logger.log(Level.WARNING, "Given Identity is null!");
 849                         return null;
 850                 }
 851                 synchronized (sones) {
 852                         final Sone sone = getRemoteSone(identity.getId(), true).setIdentity(identity);
 853                         boolean newSone = sone.getRequestUri() == null;
 854                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 855                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 856                         if (newSone) {
 857                                 synchronized (knownSones) {
 858                                         newSone = !knownSones.contains(sone.getId());
 859                                 }
 860                                 sone.setKnown(!newSone);
 861                                 if (newSone) {
 862                                         eventBus.post(new NewSoneFoundEvent(sone));
 863                                         for (Sone localSone : getLocalSones()) {
 864                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 865                                                         followSone(localSone, sone.getId());
 866                                                 }
 867                                         }
 868                                 }
 869                         }
 870                         soneDownloader.addSone(sone);
 871                         soneDownloaders.execute(new Runnable() {
 872
 873                                 @Override
 874                                 @SuppressWarnings("synthetic-access")
 875                                 public void run() {
 876                                         soneDownloader.fetchSone(sone, sone.getRequestUri());
 877                                 }
 878
 879                         });
 880                         return sone;
 881                 }
 882         }
 883
 884         /**
 885          * Lets the given local Sone follow the Sone with the given ID.
 886          *
 887          * @param sone
 888          *            The local Sone that should follow another Sone
 889          * @param soneId
 890          *            The ID of the Sone to follow
 891          */
 892         public void followSone(Sone sone, String soneId) {
 893                 checkNotNull(sone, "sone must not be null");
 894                 checkNotNull(soneId, "soneId must not be null");
 895                 sone.addFriend(soneId);
 896                 synchronized (soneFollowingTimes) {
 897                         if (!soneFollowingTimes.containsKey(soneId)) {
 898                                 long now = System.currentTimeMillis();
 899                                 soneFollowingTimes.put(soneId, now);
 900                                 Sone followedSone = getSone(soneId);
 901                                 if (followedSone == null) {
 902                                         return;
 903                                 }
 904                                 for (Post post : followedSone.getPosts()) {
 905                                         if (post.getTime() < now) {
 906                                                 markPostKnown(post);
 907                                         }
 908                                 }
 909                                 for (PostReply reply : followedSone.getReplies()) {
 910                                         if (reply.getTime() < now) {
 911                                                 markReplyKnown(reply);
 912                                         }
 913                                 }
 914                         }
 915                 }
 916                 touchConfiguration();
 917         }
 918
 919         /**
 920          * Lets the given local Sone unfollow the Sone with the given ID.
 921          *
 922          * @param sone
 923          *            The local Sone that should unfollow another Sone
 924          * @param soneId
 925          *            The ID of the Sone being unfollowed
 926          */
 927         public void unfollowSone(Sone sone, String soneId) {
 928                 checkNotNull(sone, "sone must not be null");
 929                 checkNotNull(soneId, "soneId must not be null");
 930                 sone.removeFriend(soneId);
 931                 boolean unfollowedSoneStillFollowed = false;
 932                 for (Sone localSone : getLocalSones()) {
 933                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 934                 }
 935                 if (!unfollowedSoneStillFollowed) {
 936                         synchronized (soneFollowingTimes) {
 937                                 soneFollowingTimes.remove(soneId);
 938                         }
 939                 }
 940                 touchConfiguration();
 941         }
 942
 943         /**
 944          * Sets the trust value of the given origin Sone for the target Sone.
 945          *
 946          * @param origin
 947          *            The origin Sone
 948          * @param target
 949          *            The target Sone
 950          * @param trustValue
 951          *            The trust value (from {@code -100} to {@code 100})
 952          */
 953         public void setTrust(Sone origin, Sone target, int trustValue) {
 954                 checkNotNull(origin, "origin must not be null");
 955                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 956                 checkNotNull(target, "target must not be null");
 957                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 958                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 959         }
 960
 961         /**
 962          * Removes any trust assignment for the given target Sone.
 963          *
 964          * @param origin
 965          *            The trust origin
 966          * @param target
 967          *            The trust target
 968          */
 969         public void removeTrust(Sone origin, Sone target) {
 970                 checkNotNull(origin, "origin must not be null");
 971                 checkNotNull(target, "target must not be null");
 972                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 973                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 974         }
 975
 976         /**
 977          * Assigns the configured positive trust value for the given target.
 978          *
 979          * @param origin
 980          *            The trust origin
 981          * @param target
 982          *            The trust target
 983          */
 984         public void trustSone(Sone origin, Sone target) {
 985                 setTrust(origin, target, preferences.getPositiveTrust());
 986         }
 987
 988         /**
 989          * Assigns the configured negative trust value for the given target.
 990          *
 991          * @param origin
 992          *            The trust origin
 993          * @param target
 994          *            The trust target
 995          */
 996         public void distrustSone(Sone origin, Sone target) {
 997                 setTrust(origin, target, preferences.getNegativeTrust());
 998         }
 999
1000         /**
1001          * Removes the trust assignment for the given target.
1002          *
1003          * @param origin
1004          *            The trust origin
1005          * @param target
1006          *            The trust target
1007          */
1008         public void untrustSone(Sone origin, Sone target) {
1009                 removeTrust(origin, target);
1010         }
1011
1012         /**
1013          * Updates the stored Sone with the given Sone.
1014          *
1015          * @param sone
1016          *            The updated Sone
1017          */
1018         public void updateSone(Sone sone) {
1019                 updateSone(sone, false);
1020         }
1021
1022         /**
1023          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
1024          * {@code true}, an older Sone than the current Sone can be given to restore
1025          * an old state.
1026          *
1027          * @param sone
1028          *            The Sone to update
1029          * @param soneRescueMode
1030          *            {@code true} if the stored Sone should be updated regardless
1031          *            of the age of the given Sone
1032          */
1033         public void updateSone(Sone sone, boolean soneRescueMode) {
1034                 if (hasSone(sone.getId())) {
1035                         Sone storedSone = getSone(sone.getId());
1036                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
1037                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
1038                                 return;
1039                         }
1040                         synchronized (posts) {
1041                                 if (!soneRescueMode) {
1042                                         for (Post post : storedSone.getPosts()) {
1043                                                 posts.remove(post.getId());
1044                                                 if (!sone.getPosts().contains(post)) {
1045                                                         eventBus.post(new PostRemovedEvent(post));
1046                                                 }
1047                                         }
1048                                 }
1049                                 List<Post> storedPosts = storedSone.getPosts();
1050                                 synchronized (knownPosts) {
1051                                         for (Post post : sone.getPosts()) {
1052                                                 post.setKnown(knownPosts.contains(post.getId()));
1053                                                 if (!storedPosts.contains(post)) {
1054                                                         if (post.getTime() < getSoneFollowingTime(sone)) {
1055                                                                 knownPosts.add(post.getId());
1056                                                                 post.setKnown(true);
1057                                                         } else if (!knownPosts.contains(post.getId())) {
1058                                                                 eventBus.post(new NewPostFoundEvent(post));
1059                                                         }
1060                                                 }
1061                                                 posts.put(post.getId(), post);
1062                                         }
1063                                 }
1064                         }
1065                         synchronized (replies) {
1066                                 if (!soneRescueMode) {
1067                                         for (PostReply reply : storedSone.getReplies()) {
1068                                                 replies.remove(reply.getId());
1069                                                 if (!sone.getReplies().contains(reply)) {
1070                                                         eventBus.post(new PostReplyRemovedEvent(reply));
1071                                                 }
1072                                         }
1073                                 }
1074                                 Set<PostReply> storedReplies = storedSone.getReplies();
1075                                 synchronized (knownReplies) {
1076                                         for (PostReply reply : sone.getReplies()) {
1077                                                 reply.setKnown(knownReplies.contains(reply.getId()));
1078                                                 if (!storedReplies.contains(reply)) {
1079                                                         if (reply.getTime() < getSoneFollowingTime(sone)) {
1080                                                                 knownReplies.add(reply.getId());
1081                                                                 reply.setKnown(true);
1082                                                         } else if (!knownReplies.contains(reply.getId())) {
1083                                                                 eventBus.post(new NewPostReplyFoundEvent(reply));
1084                                                         }
1085                                                 }
1086                                                 replies.put(reply.getId(), reply);
1087                                         }
1088                                 }
1089                         }
1090                         synchronized (albums) {
1091                                 synchronized (images) {
1092                                         for (Album album : storedSone.getAlbums()) {
1093                                                 albums.remove(album.getId());
1094                                                 for (Image image : album.getImages()) {
1095                                                         images.remove(image.getId());
1096                                                 }
1097                                         }
1098                                         for (Album album : sone.getAlbums()) {
1099                                                 albums.put(album.getId(), album);
1100                                                 for (Image image : album.getImages()) {
1101                                                         images.put(image.getId(), image);
1102                                                 }
1103                                         }
1104                                 }
1105                         }
1106                         synchronized (sones) {
1107                                 sones.put(sone.getId(), sone);
1108                         }
1109                 }
1110         }
1111
1112         /**
1113          * Deletes the given Sone. This will remove the Sone from the
1114          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1115          * remove the context from its identity.
1116          *
1117          * @param sone
1118          *            The Sone to delete
1119          */
1120         public void deleteSone(Sone sone) {
1121                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1122                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1123                         return;
1124                 }
1125                 synchronized (sones) {
1126                         if (!getLocalSones().contains(sone)) {
1127                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1128                                 return;
1129                         }
1130                         sones.remove(sone.getId());
1131                         SoneInserter soneInserter = soneInserters.remove(sone);
1132                         soneInserter.stop();
1133                 }
1134                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1135                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1136                 try {
1137                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1138                 } catch (ConfigurationException ce1) {
1139                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1140                 }
1141         }
1142
1143         /**
1144          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1145          * known} before, a {@link MarkSoneKnownEvent} is fired.
1146          *
1147          * @param sone
1148          *            The Sone to mark as known
1149          */
1150         public void markSoneKnown(Sone sone) {
1151                 if (!sone.isKnown()) {
1152                         sone.setKnown(true);
1153                         synchronized (knownSones) {
1154                                 knownSones.add(sone.getId());
1155                         }
1156                         eventBus.post(new MarkSoneKnownEvent(sone));
1157                         touchConfiguration();
1158                 }
1159         }
1160
1161         /**
1162          * Loads and updates the given Sone from the configuration. If any error is
1163          * encountered, loading is aborted and the given Sone is not changed.
1164          *
1165          * @param sone
1166          *            The Sone to load and update
1167          */
1168         public void loadSone(Sone sone) {
1169                 if (!sone.isLocal()) {
1170                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1171                         return;
1172                 }
1173
1174                 /* initialize options. */
1175                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1176                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1177                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1178                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1179                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1180                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1181
1182                 /* load Sone. */
1183                 String sonePrefix = "Sone/" + sone.getId();
1184                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1185                 if (soneTime == null) {
1186                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1187                         return;
1188                 }
1189                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1190
1191                 /* load profile. */
1192                 Profile profile = new Profile(sone);
1193                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1194                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1195                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1196                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1197                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1198                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1199
1200                 /* load profile fields. */
1201                 while (true) {
1202                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1203                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1204                         if (fieldName == null) {
1205                                 break;
1206                         }
1207                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1208                         profile.addField(fieldName).setValue(fieldValue);
1209                 }
1210
1211                 /* load posts. */
1212                 Set<Post> posts = new HashSet<Post>();
1213                 while (true) {
1214                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1215                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1216                         if (postId == null) {
1217                                 break;
1218                         }
1219                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1220                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1221                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1222                         if ((postTime == 0) || (postText == null)) {
1223                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1224                                 return;
1225                         }
1226                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1227                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1228                                 postBuilder.to(postRecipientId);
1229                         }
1230                         posts.add(postBuilder.build());
1231                 }
1232
1233                 /* load replies. */
1234                 Set<PostReply> replies = new HashSet<PostReply>();
1235                 while (true) {
1236                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1237                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1238                         if (replyId == null) {
1239                                 break;
1240                         }
1241                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1242                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1243                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1244                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1245                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1246                                 return;
1247                         }
1248                         PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1249                         postReplyBuilder.withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1250                         replies.add(postReplyBuilder.build());
1251                 }
1252
1253                 /* load post likes. */
1254                 Set<String> likedPostIds = new HashSet<String>();
1255                 while (true) {
1256                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1257                         if (likedPostId == null) {
1258                                 break;
1259                         }
1260                         likedPostIds.add(likedPostId);
1261                 }
1262
1263                 /* load reply likes. */
1264                 Set<String> likedReplyIds = new HashSet<String>();
1265                 while (true) {
1266                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1267                         if (likedReplyId == null) {
1268                                 break;
1269                         }
1270                         likedReplyIds.add(likedReplyId);
1271                 }
1272
1273                 /* load friends. */
1274                 Set<String> friends = new HashSet<String>();
1275                 while (true) {
1276                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1277                         if (friendId == null) {
1278                                 break;
1279                         }
1280                         friends.add(friendId);
1281                 }
1282
1283                 /* load albums. */
1284                 List<Album> topLevelAlbums = new ArrayList<Album>();
1285                 int albumCounter = 0;
1286                 while (true) {
1287                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1288                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1289                         if (albumId == null) {
1290                                 break;
1291                         }
1292                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1293                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1294                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1295                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1296                         if ((albumTitle == null) || (albumDescription == null)) {
1297                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1298                                 return;
1299                         }
1300                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId);
1301                         if (albumParentId != null) {
1302                                 Album parentAlbum = getAlbum(albumParentId, false);
1303                                 if (parentAlbum == null) {
1304                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1305                                         return;
1306                                 }
1307                                 parentAlbum.addAlbum(album);
1308                         } else {
1309                                 if (!topLevelAlbums.contains(album)) {
1310                                         topLevelAlbums.add(album);
1311                                 }
1312                         }
1313                 }
1314
1315                 /* load images. */
1316                 int imageCounter = 0;
1317                 while (true) {
1318                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1319                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1320                         if (imageId == null) {
1321                                 break;
1322                         }
1323                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1324                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1325                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1326                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1327                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1328                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1329                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1330                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1331                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1332                                 return;
1333                         }
1334                         Album album = getAlbum(albumId, false);
1335                         if (album == null) {
1336                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1337                                 return;
1338                         }
1339                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1340                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1341                         album.addImage(image);
1342                 }
1343
1344                 /* load avatar. */
1345                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1346                 if (avatarId != null) {
1347                         profile.setAvatar(getImage(avatarId, false));
1348                 }
1349
1350                 /* load options. */
1351                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1352                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1353                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1354                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1355                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1356                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1357
1358                 /* if we’re still here, Sone was loaded successfully. */
1359                 synchronized (sone) {
1360                         sone.setTime(soneTime);
1361                         sone.setProfile(profile);
1362                         sone.setPosts(posts);
1363                         sone.setReplies(replies);
1364                         sone.setLikePostIds(likedPostIds);
1365                         sone.setLikeReplyIds(likedReplyIds);
1366                         for (String friendId : friends) {
1367                                 followSone(sone, friendId);
1368                         }
1369                         sone.setAlbums(topLevelAlbums);
1370                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1371                 }
1372                 synchronized (knownSones) {
1373                         for (String friend : friends) {
1374                                 knownSones.add(friend);
1375                         }
1376                 }
1377                 synchronized (knownPosts) {
1378                         for (Post post : posts) {
1379                                 knownPosts.add(post.getId());
1380                         }
1381                 }
1382                 synchronized (knownReplies) {
1383                         for (PostReply reply : replies) {
1384                                 knownReplies.add(reply.getId());
1385                         }
1386                 }
1387         }
1388
1389         /**
1390          * Creates a new post.
1391          *
1392          * @param sone
1393          *            The Sone that creates the post
1394          * @param text
1395          *            The text of the post
1396          * @return The created post
1397          */
1398         public Post createPost(Sone sone, String text) {
1399                 return createPost(sone, System.currentTimeMillis(), text);
1400         }
1401
1402         /**
1403          * Creates a new post.
1404          *
1405          * @param sone
1406          *            The Sone that creates the post
1407          * @param time
1408          *            The time of the post
1409          * @param text
1410          *            The text of the post
1411          * @return The created post
1412          */
1413         public Post createPost(Sone sone, long time, String text) {
1414                 return createPost(sone, null, time, text);
1415         }
1416
1417         /**
1418          * Creates a new post.
1419          *
1420          * @param sone
1421          *            The Sone that creates the post
1422          * @param recipient
1423          *            The recipient Sone, or {@code null} if this post does not have
1424          *            a recipient
1425          * @param text
1426          *            The text of the post
1427          * @return The created post
1428          */
1429         public Post createPost(Sone sone, Sone recipient, String text) {
1430                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1431         }
1432
1433         /**
1434          * Creates a new post.
1435          *
1436          * @param sone
1437          *            The Sone that creates the post
1438          * @param recipient
1439          *            The recipient Sone, or {@code null} if this post does not have
1440          *            a recipient
1441          * @param time
1442          *            The time of the post
1443          * @param text
1444          *            The text of the post
1445          * @return The created post
1446          */
1447         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1448                 checkNotNull(text, "text must not be null");
1449                 checkArgument(text.trim().length() > 0, "text must not be empty");
1450                 if (!sone.isLocal()) {
1451                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1452                         return null;
1453                 }
1454                 PostBuilder postBuilder = postBuilderFactory.newPostBuilder();
1455                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1456                 if (recipient != null) {
1457                         postBuilder.to(recipient.getId());
1458                 }
1459                 final Post post = postBuilder.build();
1460                 synchronized (posts) {
1461                         posts.put(post.getId(), post);
1462                 }
1463                 eventBus.post(new NewPostFoundEvent(post));
1464                 sone.addPost(post);
1465                 touchConfiguration();
1466                 localElementTicker.schedule(new Runnable() {
1467
1468                         /**
1469                          * {@inheritDoc}
1470                          */
1471                         @Override
1472                         public void run() {
1473                                 markPostKnown(post);
1474                         }
1475                 }, 10, TimeUnit.SECONDS);
1476                 return post;
1477         }
1478
1479         /**
1480          * Deletes the given post.
1481          *
1482          * @param post
1483          *            The post to delete
1484          */
1485         public void deletePost(Post post) {
1486                 if (!post.getSone().isLocal()) {
1487                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1488                         return;
1489                 }
1490                 post.getSone().removePost(post);
1491                 synchronized (posts) {
1492                         posts.remove(post.getId());
1493                 }
1494                 eventBus.post(new PostRemovedEvent(post));
1495                 markPostKnown(post);
1496                 touchConfiguration();
1497         }
1498
1499         /**
1500          * Marks the given post as known, if it is currently not a known post
1501          * (according to {@link Post#isKnown()}).
1502          *
1503          * @param post
1504          *            The post to mark as known
1505          */
1506         public void markPostKnown(Post post) {
1507                 post.setKnown(true);
1508                 synchronized (knownPosts) {
1509                         eventBus.post(new MarkPostKnownEvent(post));
1510                         if (knownPosts.add(post.getId())) {
1511                                 touchConfiguration();
1512                         }
1513                 }
1514                 for (PostReply reply : getReplies(post)) {
1515                         markReplyKnown(reply);
1516                 }
1517         }
1518
1519         /**
1520          * Bookmarks the given post.
1521          *
1522          * @param post
1523          *            The post to bookmark
1524          */
1525         public void bookmark(Post post) {
1526                 bookmarkPost(post.getId());
1527         }
1528
1529         /**
1530          * Bookmarks the post with the given ID.
1531          *
1532          * @param id
1533          *            The ID of the post to bookmark
1534          */
1535         public void bookmarkPost(String id) {
1536                 synchronized (bookmarkedPosts) {
1537                         bookmarkedPosts.add(id);
1538                 }
1539         }
1540
1541         /**
1542          * Removes the given post from the bookmarks.
1543          *
1544          * @param post
1545          *            The post to unbookmark
1546          */
1547         public void unbookmark(Post post) {
1548                 unbookmarkPost(post.getId());
1549         }
1550
1551         /**
1552          * Removes the post with the given ID from the bookmarks.
1553          *
1554          * @param id
1555          *            The ID of the post to unbookmark
1556          */
1557         public void unbookmarkPost(String id) {
1558                 synchronized (bookmarkedPosts) {
1559                         bookmarkedPosts.remove(id);
1560                 }
1561         }
1562
1563         /**
1564          * Creates a new reply.
1565          *
1566          * @param sone
1567          *            The Sone that creates the reply
1568          * @param post
1569          *            The post that this reply refers to
1570          * @param text
1571          *            The text of the reply
1572          * @return The created reply
1573          */
1574         public PostReply createReply(Sone sone, Post post, String text) {
1575                 checkNotNull(text, "text must not be null");
1576                 checkArgument(text.trim().length() > 0, "text must not be empty");
1577                 if (!sone.isLocal()) {
1578                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1579                         return null;
1580                 }
1581                 PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1582                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1583                 final PostReply reply = postReplyBuilder.build();
1584                 synchronized (replies) {
1585                         replies.put(reply.getId(), reply);
1586                 }
1587                 synchronized (knownReplies) {
1588                         eventBus.post(new NewPostReplyFoundEvent(reply));
1589                 }
1590                 sone.addReply(reply);
1591                 touchConfiguration();
1592                 localElementTicker.schedule(new Runnable() {
1593
1594                         /**
1595                          * {@inheritDoc}
1596                          */
1597                         @Override
1598                         public void run() {
1599                                 markReplyKnown(reply);
1600                         }
1601                 }, 10, TimeUnit.SECONDS);
1602                 return reply;
1603         }
1604
1605         /**
1606          * Deletes the given reply.
1607          *
1608          * @param reply
1609          *            The reply to delete
1610          */
1611         public void deleteReply(PostReply reply) {
1612                 Sone sone = reply.getSone();
1613                 if (!sone.isLocal()) {
1614                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1615                         return;
1616                 }
1617                 synchronized (replies) {
1618                         replies.remove(reply.getId());
1619                 }
1620                 synchronized (knownReplies) {
1621                         markReplyKnown(reply);
1622                         knownReplies.remove(reply.getId());
1623                 }
1624                 sone.removeReply(reply);
1625                 touchConfiguration();
1626         }
1627
1628         /**
1629          * Marks the given reply as known, if it is currently not a known reply
1630          * (according to {@link Reply#isKnown()}).
1631          *
1632          * @param reply
1633          *            The reply to mark as known
1634          */
1635         public void markReplyKnown(PostReply reply) {
1636                 reply.setKnown(true);
1637                 synchronized (knownReplies) {
1638                         eventBus.post(new MarkPostReplyKnownEvent(reply));
1639                         if (knownReplies.add(reply.getId())) {
1640                                 touchConfiguration();
1641                         }
1642                 }
1643         }
1644
1645         /**
1646          * Creates a new top-level album for the given Sone.
1647          *
1648          * @param sone
1649          *            The Sone to create the album for
1650          * @return The new album
1651          */
1652         public Album createAlbum(Sone sone) {
1653                 return createAlbum(sone, null);
1654         }
1655
1656         /**
1657          * Creates a new album for the given Sone.
1658          *
1659          * @param sone
1660          *            The Sone to create the album for
1661          * @param parent
1662          *            The parent of the album (may be {@code null} to create a
1663          *            top-level album)
1664          * @return The new album
1665          */
1666         public Album createAlbum(Sone sone, Album parent) {
1667                 Album album = new Album();
1668                 synchronized (albums) {
1669                         albums.put(album.getId(), album);
1670                 }
1671                 album.setSone(sone);
1672                 if (parent != null) {
1673                         parent.addAlbum(album);
1674                 } else {
1675                         sone.addAlbum(album);
1676                 }
1677                 return album;
1678         }
1679
1680         /**
1681          * Deletes the given album. The owner of the album has to be a local Sone,
1682          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1683          *
1684          * @param album
1685          *            The album to remove
1686          */
1687         public void deleteAlbum(Album album) {
1688                 checkNotNull(album, "album must not be null");
1689                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1690                 if (!album.isEmpty()) {
1691                         return;
1692                 }
1693                 if (album.getParent() == null) {
1694                         album.getSone().removeAlbum(album);
1695                 } else {
1696                         album.getParent().removeAlbum(album);
1697                 }
1698                 synchronized (albums) {
1699                         albums.remove(album.getId());
1700                 }
1701                 touchConfiguration();
1702         }
1703
1704         /**
1705          * Creates a new image.
1706          *
1707          * @param sone
1708          *            The Sone creating the image
1709          * @param album
1710          *            The album the image will be inserted into
1711          * @param temporaryImage
1712          *            The temporary image to create the image from
1713          * @return The newly created image
1714          */
1715         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1716                 checkNotNull(sone, "sone must not be null");
1717                 checkNotNull(album, "album must not be null");
1718                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1719                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1720                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1721                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1722                 album.addImage(image);
1723                 synchronized (images) {
1724                         images.put(image.getId(), image);
1725                 }
1726                 imageInserter.insertImage(temporaryImage, image);
1727                 return image;
1728         }
1729
1730         /**
1731          * Deletes the given image. This method will also delete a matching
1732          * temporary image.
1733          *
1734          * @see #deleteTemporaryImage(TemporaryImage)
1735          * @param image
1736          *            The image to delete
1737          */
1738         public void deleteImage(Image image) {
1739                 checkNotNull(image, "image must not be null");
1740                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1741                 deleteTemporaryImage(image.getId());
1742                 image.getAlbum().removeImage(image);
1743                 synchronized (images) {
1744                         images.remove(image.getId());
1745                 }
1746                 touchConfiguration();
1747         }
1748
1749         /**
1750          * Creates a new temporary image.
1751          *
1752          * @param mimeType
1753          *            The MIME type of the temporary image
1754          * @param imageData
1755          *            The encoded data of the image
1756          * @return The temporary image
1757          */
1758         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1759                 TemporaryImage temporaryImage = new TemporaryImage();
1760                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1761                 synchronized (temporaryImages) {
1762                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1763                 }
1764                 return temporaryImage;
1765         }
1766
1767         /**
1768          * Deletes the given temporary image.
1769          *
1770          * @param temporaryImage
1771          *            The temporary image to delete
1772          */
1773         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1774                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1775                 deleteTemporaryImage(temporaryImage.getId());
1776         }
1777
1778         /**
1779          * Deletes the temporary image with the given ID.
1780          *
1781          * @param imageId
1782          *            The ID of the temporary image to delete
1783          */
1784         public void deleteTemporaryImage(String imageId) {
1785                 checkNotNull(imageId, "imageId must not be null");
1786                 synchronized (temporaryImages) {
1787                         temporaryImages.remove(imageId);
1788                 }
1789                 Image image = getImage(imageId, false);
1790                 if (image != null) {
1791                         imageInserter.cancelImageInsert(image);
1792                 }
1793         }
1794
1795         /**
1796          * Notifies the core that the configuration, either of the core or of a
1797          * single local Sone, has changed, and that the configuration should be
1798          * saved.
1799          */
1800         public void touchConfiguration() {
1801                 lastConfigurationUpdate = System.currentTimeMillis();
1802         }
1803
1804         //
1805         // SERVICE METHODS
1806         //
1807
1808         /**
1809          * Starts the core.
1810          */
1811         @Override
1812         public void serviceStart() {
1813                 loadConfiguration();
1814                 updateChecker.start();
1815                 identityManager.start();
1816                 webOfTrustUpdater.init();
1817                 webOfTrustUpdater.start();
1818         }
1819
1820         /**
1821          * {@inheritDoc}
1822          */
1823         @Override
1824         public void serviceRun() {
1825                 long lastSaved = System.currentTimeMillis();
1826                 while (!shouldStop()) {
1827                         sleep(1000);
1828                         long now = System.currentTimeMillis();
1829                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1830                                 for (Sone localSone : getLocalSones()) {
1831                                         saveSone(localSone);
1832                                 }
1833                                 saveConfiguration();
1834                                 lastSaved = now;
1835                         }
1836                 }
1837         }
1838
1839         /**
1840          * Stops the core.
1841          */
1842         @Override
1843         public void serviceStop() {
1844                 localElementTicker.shutdownNow();
1845                 synchronized (sones) {
1846                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1847                                 soneInserter.getValue().stop();
1848                                 saveSone(soneInserter.getKey());
1849                         }
1850                 }
1851                 saveConfiguration();
1852                 webOfTrustUpdater.stop();
1853                 updateChecker.stop();
1854                 soneDownloader.stop();
1855                 soneDownloaders.shutdown();
1856                 identityManager.stop();
1857         }
1858
1859         //
1860         // PRIVATE METHODS
1861         //
1862
1863         /**
1864          * Saves the given Sone. This will persist all local settings for the given
1865          * Sone, such as the friends list and similar, private options.
1866          *
1867          * @param sone
1868          *            The Sone to save
1869          */
1870         private synchronized void saveSone(Sone sone) {
1871                 if (!sone.isLocal()) {
1872                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1873                         return;
1874                 }
1875                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1876                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1877                         return;
1878                 }
1879
1880                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1881                 try {
1882                         /* save Sone into configuration. */
1883                         String sonePrefix = "Sone/" + sone.getId();
1884                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1885                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1886
1887                         /* save profile. */
1888                         Profile profile = sone.getProfile();
1889                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1890                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1891                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1892                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1893                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1894                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1895                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1896
1897                         /* save profile fields. */
1898                         int fieldCounter = 0;
1899                         for (Field profileField : profile.getFields()) {
1900                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1901                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1902                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1903                         }
1904                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1905
1906                         /* save posts. */
1907                         int postCounter = 0;
1908                         for (Post post : sone.getPosts()) {
1909                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1910                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1911                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1912                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1913                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1914                         }
1915                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1916
1917                         /* save replies. */
1918                         int replyCounter = 0;
1919                         for (PostReply reply : sone.getReplies()) {
1920                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1921                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1922                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1923                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1924                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1925                         }
1926                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1927
1928                         /* save post likes. */
1929                         int postLikeCounter = 0;
1930                         for (String postId : sone.getLikedPostIds()) {
1931                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1932                         }
1933                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1934
1935                         /* save reply likes. */
1936                         int replyLikeCounter = 0;
1937                         for (String replyId : sone.getLikedReplyIds()) {
1938                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1939                         }
1940                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1941
1942                         /* save friends. */
1943                         int friendCounter = 0;
1944                         for (String friendId : sone.getFriends()) {
1945                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1946                         }
1947                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1948
1949                         /* save albums. first, collect in a flat structure, top-level first. */
1950                         List<Album> albums = sone.getAllAlbums();
1951
1952                         int albumCounter = 0;
1953                         for (Album album : albums) {
1954                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1955                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1956                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1957                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1958                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
1959                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1960                         }
1961                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1962
1963                         /* save images. */
1964                         int imageCounter = 0;
1965                         for (Album album : albums) {
1966                                 for (Image image : album.getImages()) {
1967                                         if (!image.isInserted()) {
1968                                                 continue;
1969                                         }
1970                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1971                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1972                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1973                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1974                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1975                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1976                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1977                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1978                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1979                                 }
1980                         }
1981                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1982
1983                         /* save options. */
1984                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1985                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1986                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1987                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1988                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
1989                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
1990
1991                         configuration.save();
1992
1993                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1994
1995                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1996                 } catch (ConfigurationException ce1) {
1997                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1998                 }
1999         }
2000
2001         /**
2002          * Saves the current options.
2003          */
2004         private void saveConfiguration() {
2005                 synchronized (configuration) {
2006                         if (storingConfiguration) {
2007                                 logger.log(Level.FINE, "Already storing configuration…");
2008                                 return;
2009                         }
2010                         storingConfiguration = true;
2011                 }
2012
2013                 /* store the options first. */
2014                 try {
2015                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
2016                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
2017                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
2018                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
2019                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
2020                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
2021                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
2022                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
2023                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
2024                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
2025                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
2026                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
2027
2028                         /* save known Sones. */
2029                         int soneCounter = 0;
2030                         synchronized (knownSones) {
2031                                 for (String knownSoneId : knownSones) {
2032                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
2033                                 }
2034                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
2035                         }
2036
2037                         /* save Sone following times. */
2038                         soneCounter = 0;
2039                         synchronized (soneFollowingTimes) {
2040                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
2041                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
2042                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
2043                                         ++soneCounter;
2044                                 }
2045                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
2046                         }
2047
2048                         /* save known posts. */
2049                         int postCounter = 0;
2050                         synchronized (knownPosts) {
2051                                 for (String knownPostId : knownPosts) {
2052                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
2053                                 }
2054                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
2055                         }
2056
2057                         /* save known replies. */
2058                         int replyCounter = 0;
2059                         synchronized (knownReplies) {
2060                                 for (String knownReplyId : knownReplies) {
2061                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
2062                                 }
2063                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
2064                         }
2065
2066                         /* save bookmarked posts. */
2067                         int bookmarkedPostCounter = 0;
2068                         synchronized (bookmarkedPosts) {
2069                                 for (String bookmarkedPostId : bookmarkedPosts) {
2070                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
2071                                 }
2072                         }
2073                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
2074
2075                         /* now save it. */
2076                         configuration.save();
2077
2078                 } catch (ConfigurationException ce1) {
2079                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2080                 } finally {
2081                         synchronized (configuration) {
2082                                 storingConfiguration = false;
2083                         }
2084                 }
2085         }
2086
2087         /**
2088          * Loads the configuration.
2089          */
2090         @SuppressWarnings("unchecked")
2091         private void loadConfiguration() {
2092                 /* create options. */
2093                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
2094
2095                         @Override
2096                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2097                                 SoneInserter.setInsertionDelay(newValue);
2098                         }
2099
2100                 }));
2101                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2102                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2103                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2104                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2105                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
2106                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
2107                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
2108                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2109                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
2110
2111                         @Override
2112                         @SuppressWarnings("synthetic-access")
2113                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
2114                                 fcpInterface.setActive(newValue);
2115                         }
2116                 }));
2117                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
2118
2119                         @Override
2120                         @SuppressWarnings("synthetic-access")
2121                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2122                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
2123                         }
2124
2125                 }));
2126
2127                 loadConfigurationValue("InsertionDelay");
2128                 loadConfigurationValue("PostsPerPage");
2129                 loadConfigurationValue("ImagesPerPage");
2130                 loadConfigurationValue("CharactersPerPost");
2131                 loadConfigurationValue("PostCutOffLength");
2132                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2133                 loadConfigurationValue("PositiveTrust");
2134                 loadConfigurationValue("NegativeTrust");
2135                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2136                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2137                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2138
2139                 /* load known Sones. */
2140                 int soneCounter = 0;
2141                 while (true) {
2142                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2143                         if (knownSoneId == null) {
2144                                 break;
2145                         }
2146                         synchronized (knownSones) {
2147                                 knownSones.add(knownSoneId);
2148                         }
2149                 }
2150
2151                 /* load Sone following times. */
2152                 soneCounter = 0;
2153                 while (true) {
2154                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2155                         if (soneId == null) {
2156                                 break;
2157                         }
2158                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2159                         Sone followedSone = getSone(soneId);
2160                         if (followedSone == null) {
2161                                 logger.log(Level.WARNING, String.format("Ignoring Sone with invalid ID: %s", soneId));
2162                         } else {
2163                                 synchronized (soneFollowingTimes) {
2164                                         soneFollowingTimes.put(soneId, time);
2165                                 }
2166                         }
2167                         ++soneCounter;
2168                 }
2169
2170                 /* load known posts. */
2171                 int postCounter = 0;
2172                 while (true) {
2173                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2174                         if (knownPostId == null) {
2175                                 break;
2176                         }
2177                         synchronized (knownPosts) {
2178                                 knownPosts.add(knownPostId);
2179                         }
2180                 }
2181
2182                 /* load known replies. */
2183                 int replyCounter = 0;
2184                 while (true) {
2185                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2186                         if (knownReplyId == null) {
2187                                 break;
2188                         }
2189                         synchronized (knownReplies) {
2190                                 knownReplies.add(knownReplyId);
2191                         }
2192                 }
2193
2194                 /* load bookmarked posts. */
2195                 int bookmarkedPostCounter = 0;
2196                 while (true) {
2197                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2198                         if (bookmarkedPostId == null) {
2199                                 break;
2200                         }
2201                         synchronized (bookmarkedPosts) {
2202                                 bookmarkedPosts.add(bookmarkedPostId);
2203                         }
2204                 }
2205
2206         }
2207
2208         /**
2209          * Loads an {@link Integer} configuration value for the option with the
2210          * given name, logging validation failures.
2211          *
2212          * @param optionName
2213          *            The name of the option to load
2214          */
2215         private void loadConfigurationValue(String optionName) {
2216                 try {
2217                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2218                 } catch (IllegalArgumentException iae1) {
2219                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2220                 }
2221         }
2222
2223         /**
2224          * Notifies the core that a new {@link OwnIdentity} was added.
2225          *
2226          * @param ownIdentityAddedEvent
2227          *            The event
2228          */
2229         @Subscribe
2230         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2231                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2232                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2233                 if (ownIdentity.hasContext("Sone")) {
2234                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2235                         addLocalSone(ownIdentity);
2236                 }
2237         }
2238
2239         /**
2240          * Notifies the core that an {@link OwnIdentity} was removed.
2241          *
2242          * @param ownIdentityRemovedEvent
2243          *            The event
2244          */
2245         @Subscribe
2246         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2247                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2248                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2249                 trustedIdentities.remove(ownIdentity);
2250         }
2251
2252         /**
2253          * Notifies the core that a new {@link Identity} was added.
2254          *
2255          * @param identityAddedEvent
2256          *            The event
2257          */
2258         @Subscribe
2259         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2260                 Identity identity = identityAddedEvent.identity();
2261                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2262                 trustedIdentities.get(identityAddedEvent.ownIdentity()).add(identity);
2263                 addRemoteSone(identity);
2264         }
2265
2266         /**
2267          * Notifies the core that an {@link Identity} was updated.
2268          *
2269          * @param identityUpdatedEvent
2270          *            The event
2271          */
2272         @Subscribe
2273         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2274                 final Identity identity = identityUpdatedEvent.identity();
2275                 soneDownloaders.execute(new Runnable() {
2276
2277                         @Override
2278                         @SuppressWarnings("synthetic-access")
2279                         public void run() {
2280                                 Sone sone = getRemoteSone(identity.getId(), false);
2281                                 sone.setIdentity(identity);
2282                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2283                                 soneDownloader.addSone(sone);
2284                                 soneDownloader.fetchSone(sone);
2285                         }
2286                 });
2287         }
2288
2289         /**
2290          * Notifies the core that an {@link Identity} was removed.
2291          *
2292          * @param identityRemovedEvent
2293          *            The event
2294          */
2295         @Subscribe
2296         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2297                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2298                 Identity identity = identityRemovedEvent.identity();
2299                 trustedIdentities.get(ownIdentity).remove(identity);
2300                 boolean foundIdentity = false;
2301                 for (Entry<OwnIdentity, Set<Identity>> trustedIdentity : trustedIdentities.entrySet()) {
2302                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2303                                 continue;
2304                         }
2305                         if (trustedIdentity.getValue().contains(identity)) {
2306                                 foundIdentity = true;
2307                         }
2308                 }
2309                 if (foundIdentity) {
2310                         /* some local identity still trusts this identity, don’t remove. */
2311                         return;
2312                 }
2313                 Sone sone = getSone(identity.getId());
2314                 if (sone == null) {
2315                         /* TODO - we don’t have the Sone anymore. should this happen? */
2316                         return;
2317                 }
2318                 synchronized (posts) {
2319                         synchronized (knownPosts) {
2320                                 for (Post post : sone.getPosts()) {
2321                                         posts.remove(post.getId());
2322                                         eventBus.post(new PostRemovedEvent(post));
2323                                 }
2324                         }
2325                 }
2326                 synchronized (replies) {
2327                         synchronized (knownReplies) {
2328                                 for (PostReply reply : sone.getReplies()) {
2329                                         replies.remove(reply.getId());
2330                                         eventBus.post(new PostReplyRemovedEvent(reply));
2331                                 }
2332                         }
2333                 }
2334                 synchronized (sones) {
2335                         sones.remove(identity.getId());
2336                 }
2337                 eventBus.post(new SoneRemovedEvent(sone));
2338         }
2339
2340         /**
2341          * Deletes the temporary image.
2342          *
2343          * @param imageInsertFinishedEvent
2344          *            The event
2345          */
2346         @Subscribe
2347         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2348                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2349                 imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
2350                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2351                 touchConfiguration();
2352         }
2353
2354 }