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         /**
 547          * Returns a post reply builder.
 548          *
 549          * @return A new post reply builder
 550          */
 551         public PostReplyBuilder postReplyBuilder() {
 552                 return postReplyBuilderFactory.newPostReplyBuilder();
 553         }
 554
 555         /**
 556          * {@inheritDoc}
 557          */
 558         @Override
 559         public Optional<PostReply> getPostReply(String replyId) {
 560                 synchronized (replies) {
 561                         return Optional.fromNullable(replies.get(replyId));
 562                 }
 563         }
 564
 565         /**
 566          * {@inheritDoc}
 567          */
 568         @Override
 569         public List<PostReply> getReplies(final Post post) {
 570                 return Ordering.from(Reply.TIME_COMPARATOR).sortedCopy(FluentIterable.from(getSones()).transformAndConcat(new Function<Sone, Iterable<PostReply>>() {
 571
 572                         @Override
 573                         public Iterable<PostReply> apply(Sone sone) {
 574                                 return sone.getReplies();
 575                         }
 576                 }).filter(new Predicate<PostReply>() {
 577
 578                         @Override
 579                         public boolean apply(PostReply reply) {
 580                                 return post.getId().equals(reply.getPostId());
 581                         }
 582                 }));
 583         }
 584
 585         /**
 586          * Returns all Sones that have liked the given post.
 587          *
 588          * @param post
 589          *            The post to get the liking Sones for
 590          * @return The Sones that like the given post
 591          */
 592         public Set<Sone> getLikes(Post post) {
 593                 Set<Sone> sones = new HashSet<Sone>();
 594                 for (Sone sone : getSones()) {
 595                         if (sone.getLikedPostIds().contains(post.getId())) {
 596                                 sones.add(sone);
 597                         }
 598                 }
 599                 return sones;
 600         }
 601
 602         /**
 603          * Returns all Sones that have liked the given reply.
 604          *
 605          * @param reply
 606          *            The reply to get the liking Sones for
 607          * @return The Sones that like the given reply
 608          */
 609         public Set<Sone> getLikes(PostReply reply) {
 610                 Set<Sone> sones = new HashSet<Sone>();
 611                 for (Sone sone : getSones()) {
 612                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 613                                 sones.add(sone);
 614                         }
 615                 }
 616                 return sones;
 617         }
 618
 619         /**
 620          * Returns whether the given post is bookmarked.
 621          *
 622          * @param post
 623          *            The post to check
 624          * @return {@code true} if the given post is bookmarked, {@code false}
 625          *         otherwise
 626          */
 627         public boolean isBookmarked(Post post) {
 628                 return isPostBookmarked(post.getId());
 629         }
 630
 631         /**
 632          * Returns whether the post with the given ID is bookmarked.
 633          *
 634          * @param id
 635          *            The ID of the post to check
 636          * @return {@code true} if the post with the given ID is bookmarked,
 637          *         {@code false} otherwise
 638          */
 639         public boolean isPostBookmarked(String id) {
 640                 synchronized (bookmarkedPosts) {
 641                         return bookmarkedPosts.contains(id);
 642                 }
 643         }
 644
 645         /**
 646          * Returns all currently known bookmarked posts.
 647          *
 648          * @return All bookmarked posts
 649          */
 650         public Set<Post> getBookmarkedPosts() {
 651                 Set<Post> posts = new HashSet<Post>();
 652                 synchronized (bookmarkedPosts) {
 653                         for (String bookmarkedPostId : bookmarkedPosts) {
 654                                 Optional<Post> post = getPost(bookmarkedPostId);
 655                                 if (!post.isPresent()) {
 656                                         posts.add(post.get());
 657                                 }
 658                         }
 659                 }
 660                 return posts;
 661         }
 662
 663         /**
 664          * Returns the album with the given ID, creating a new album if no album
 665          * with the given ID can be found.
 666          *
 667          * @param albumId
 668          *            The ID of the album
 669          * @return The album with the given ID
 670          */
 671         public Album getAlbum(String albumId) {
 672                 return getAlbum(albumId, true);
 673         }
 674
 675         /**
 676          * Returns the album with the given ID, optionally creating a new album if
 677          * an album with the given ID can not be found.
 678          *
 679          * @param albumId
 680          *            The ID of the album
 681          * @param create
 682          *            {@code true} to create a new album if none exists for the
 683          *            given ID
 684          * @return The album with the given ID, or {@code null} if no album with the
 685          *         given ID exists and {@code create} is {@code false}
 686          */
 687         public Album getAlbum(String albumId, boolean create) {
 688                 synchronized (albums) {
 689                         Album album = albums.get(albumId);
 690                         if (create && (album == null)) {
 691                                 album = new Album(albumId);
 692                                 albums.put(albumId, album);
 693                         }
 694                         return album;
 695                 }
 696         }
 697
 698         /**
 699          * Returns the image with the given ID, creating it if necessary.
 700          *
 701          * @param imageId
 702          *            The ID of the image
 703          * @return The image with the given ID
 704          */
 705         public Image getImage(String imageId) {
 706                 return getImage(imageId, true);
 707         }
 708
 709         /**
 710          * Returns the image with the given ID, optionally creating it if it does
 711          * not exist.
 712          *
 713          * @param imageId
 714          *            The ID of the image
 715          * @param create
 716          *            {@code true} to create an image if none exists with the given
 717          *            ID
 718          * @return The image with the given ID, or {@code null} if none exists and
 719          *         none was created
 720          */
 721         public Image getImage(String imageId, boolean create) {
 722                 synchronized (images) {
 723                         Image image = images.get(imageId);
 724                         if (create && (image == null)) {
 725                                 image = new Image(imageId);
 726                                 images.put(imageId, image);
 727                         }
 728                         return image;
 729                 }
 730         }
 731
 732         /**
 733          * Returns the temporary image with the given ID.
 734          *
 735          * @param imageId
 736          *            The ID of the temporary image
 737          * @return The temporary image, or {@code null} if there is no temporary
 738          *         image with the given ID
 739          */
 740         public TemporaryImage getTemporaryImage(String imageId) {
 741                 synchronized (temporaryImages) {
 742                         return temporaryImages.get(imageId);
 743                 }
 744         }
 745
 746         //
 747         // ACTIONS
 748         //
 749
 750         /**
 751          * Locks the given Sone. A locked Sone will not be inserted by
 752          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 753          * again.
 754          *
 755          * @param sone
 756          *            The sone to lock
 757          */
 758         public void lockSone(Sone sone) {
 759                 synchronized (lockedSones) {
 760                         if (lockedSones.add(sone)) {
 761                                 eventBus.post(new SoneLockedEvent(sone));
 762                         }
 763                 }
 764         }
 765
 766         /**
 767          * Unlocks the given Sone.
 768          *
 769          * @see #lockSone(Sone)
 770          * @param sone
 771          *            The sone to unlock
 772          */
 773         public void unlockSone(Sone sone) {
 774                 synchronized (lockedSones) {
 775                         if (lockedSones.remove(sone)) {
 776                                 eventBus.post(new SoneUnlockedEvent(sone));
 777                         }
 778                 }
 779         }
 780
 781         /**
 782          * Adds a local Sone from the given own identity.
 783          *
 784          * @param ownIdentity
 785          *            The own identity to create a Sone from
 786          * @return The added (or already existing) Sone
 787          */
 788         public Sone addLocalSone(OwnIdentity ownIdentity) {
 789                 if (ownIdentity == null) {
 790                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 791                         return null;
 792                 }
 793                 synchronized (sones) {
 794                         final Sone sone;
 795                         try {
 796                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 797                         } catch (MalformedURLException mue1) {
 798                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 799                                 return null;
 800                         }
 801                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 802                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 803                         sone.setKnown(true);
 804                         /* TODO - load posts ’n stuff */
 805                         sones.put(ownIdentity.getId(), sone);
 806                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 807                         soneInserters.put(sone, soneInserter);
 808                         sone.setStatus(SoneStatus.idle);
 809                         loadSone(sone);
 810                         soneInserter.start();
 811                         return sone;
 812                 }
 813         }
 814
 815         /**
 816          * Creates a new Sone for the given own identity.
 817          *
 818          * @param ownIdentity
 819          *            The own identity to create a Sone for
 820          * @return The created Sone
 821          */
 822         public Sone createSone(OwnIdentity ownIdentity) {
 823                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 824                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 825                         return null;
 826                 }
 827                 Sone sone = addLocalSone(ownIdentity);
 828                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 829                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 830                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 831                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 832                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 833                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 834
 835                 followSone(sone, "nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI");
 836                 touchConfiguration();
 837                 return sone;
 838         }
 839
 840         /**
 841          * Adds the Sone of the given identity.
 842          *
 843          * @param identity
 844          *            The identity whose Sone to add
 845          * @return The added or already existing Sone
 846          */
 847         public Sone addRemoteSone(Identity identity) {
 848                 if (identity == null) {
 849                         logger.log(Level.WARNING, "Given Identity is null!");
 850                         return null;
 851                 }
 852                 synchronized (sones) {
 853                         final Sone sone = getRemoteSone(identity.getId(), true).setIdentity(identity);
 854                         boolean newSone = sone.getRequestUri() == null;
 855                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 856                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 857                         if (newSone) {
 858                                 synchronized (knownSones) {
 859                                         newSone = !knownSones.contains(sone.getId());
 860                                 }
 861                                 sone.setKnown(!newSone);
 862                                 if (newSone) {
 863                                         eventBus.post(new NewSoneFoundEvent(sone));
 864                                         for (Sone localSone : getLocalSones()) {
 865                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 866                                                         followSone(localSone, sone.getId());
 867                                                 }
 868                                         }
 869                                 }
 870                         }
 871                         soneDownloader.addSone(sone);
 872                         soneDownloaders.execute(new Runnable() {
 873
 874                                 @Override
 875                                 @SuppressWarnings("synthetic-access")
 876                                 public void run() {
 877                                         soneDownloader.fetchSone(sone, sone.getRequestUri());
 878                                 }
 879
 880                         });
 881                         return sone;
 882                 }
 883         }
 884
 885         /**
 886          * Lets the given local Sone follow the Sone with the given ID.
 887          *
 888          * @param sone
 889          *            The local Sone that should follow another Sone
 890          * @param soneId
 891          *            The ID of the Sone to follow
 892          */
 893         public void followSone(Sone sone, String soneId) {
 894                 checkNotNull(sone, "sone must not be null");
 895                 checkNotNull(soneId, "soneId must not be null");
 896                 sone.addFriend(soneId);
 897                 synchronized (soneFollowingTimes) {
 898                         if (!soneFollowingTimes.containsKey(soneId)) {
 899                                 long now = System.currentTimeMillis();
 900                                 soneFollowingTimes.put(soneId, now);
 901                                 Sone followedSone = getSone(soneId);
 902                                 if (followedSone == null) {
 903                                         return;
 904                                 }
 905                                 for (Post post : followedSone.getPosts()) {
 906                                         if (post.getTime() < now) {
 907                                                 markPostKnown(post);
 908                                         }
 909                                 }
 910                                 for (PostReply reply : followedSone.getReplies()) {
 911                                         if (reply.getTime() < now) {
 912                                                 markReplyKnown(reply);
 913                                         }
 914                                 }
 915                         }
 916                 }
 917                 touchConfiguration();
 918         }
 919
 920         /**
 921          * Lets the given local Sone unfollow the Sone with the given ID.
 922          *
 923          * @param sone
 924          *            The local Sone that should unfollow another Sone
 925          * @param soneId
 926          *            The ID of the Sone being unfollowed
 927          */
 928         public void unfollowSone(Sone sone, String soneId) {
 929                 checkNotNull(sone, "sone must not be null");
 930                 checkNotNull(soneId, "soneId must not be null");
 931                 sone.removeFriend(soneId);
 932                 boolean unfollowedSoneStillFollowed = false;
 933                 for (Sone localSone : getLocalSones()) {
 934                         unfollowedSoneStillFollowed |= localSone.hasFriend(soneId);
 935                 }
 936                 if (!unfollowedSoneStillFollowed) {
 937                         synchronized (soneFollowingTimes) {
 938                                 soneFollowingTimes.remove(soneId);
 939                         }
 940                 }
 941                 touchConfiguration();
 942         }
 943
 944         /**
 945          * Sets the trust value of the given origin Sone for the target Sone.
 946          *
 947          * @param origin
 948          *            The origin Sone
 949          * @param target
 950          *            The target Sone
 951          * @param trustValue
 952          *            The trust value (from {@code -100} to {@code 100})
 953          */
 954         public void setTrust(Sone origin, Sone target, int trustValue) {
 955                 checkNotNull(origin, "origin must not be null");
 956                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 957                 checkNotNull(target, "target must not be null");
 958                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
 959                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
 960         }
 961
 962         /**
 963          * Removes any trust assignment for the given target Sone.
 964          *
 965          * @param origin
 966          *            The trust origin
 967          * @param target
 968          *            The trust target
 969          */
 970         public void removeTrust(Sone origin, Sone target) {
 971                 checkNotNull(origin, "origin must not be null");
 972                 checkNotNull(target, "target must not be null");
 973                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
 974                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
 975         }
 976
 977         /**
 978          * Assigns the configured positive trust value for the given target.
 979          *
 980          * @param origin
 981          *            The trust origin
 982          * @param target
 983          *            The trust target
 984          */
 985         public void trustSone(Sone origin, Sone target) {
 986                 setTrust(origin, target, preferences.getPositiveTrust());
 987         }
 988
 989         /**
 990          * Assigns the configured negative trust value for the given target.
 991          *
 992          * @param origin
 993          *            The trust origin
 994          * @param target
 995          *            The trust target
 996          */
 997         public void distrustSone(Sone origin, Sone target) {
 998                 setTrust(origin, target, preferences.getNegativeTrust());
 999         }
1000
1001         /**
1002          * Removes the trust assignment for the given target.
1003          *
1004          * @param origin
1005          *            The trust origin
1006          * @param target
1007          *            The trust target
1008          */
1009         public void untrustSone(Sone origin, Sone target) {
1010                 removeTrust(origin, target);
1011         }
1012
1013         /**
1014          * Updates the stored Sone with the given Sone.
1015          *
1016          * @param sone
1017          *            The updated Sone
1018          */
1019         public void updateSone(Sone sone) {
1020                 updateSone(sone, false);
1021         }
1022
1023         /**
1024          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
1025          * {@code true}, an older Sone than the current Sone can be given to restore
1026          * an old state.
1027          *
1028          * @param sone
1029          *            The Sone to update
1030          * @param soneRescueMode
1031          *            {@code true} if the stored Sone should be updated regardless
1032          *            of the age of the given Sone
1033          */
1034         public void updateSone(Sone sone, boolean soneRescueMode) {
1035                 if (hasSone(sone.getId())) {
1036                         Sone storedSone = getSone(sone.getId());
1037                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
1038                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
1039                                 return;
1040                         }
1041                         synchronized (posts) {
1042                                 if (!soneRescueMode) {
1043                                         for (Post post : storedSone.getPosts()) {
1044                                                 posts.remove(post.getId());
1045                                                 if (!sone.getPosts().contains(post)) {
1046                                                         eventBus.post(new PostRemovedEvent(post));
1047                                                 }
1048                                         }
1049                                 }
1050                                 List<Post> storedPosts = storedSone.getPosts();
1051                                 synchronized (knownPosts) {
1052                                         for (Post post : sone.getPosts()) {
1053                                                 post.setKnown(knownPosts.contains(post.getId()));
1054                                                 if (!storedPosts.contains(post)) {
1055                                                         if (post.getTime() < getSoneFollowingTime(sone)) {
1056                                                                 knownPosts.add(post.getId());
1057                                                                 post.setKnown(true);
1058                                                         } else if (!knownPosts.contains(post.getId())) {
1059                                                                 eventBus.post(new NewPostFoundEvent(post));
1060                                                         }
1061                                                 }
1062                                                 posts.put(post.getId(), post);
1063                                         }
1064                                 }
1065                         }
1066                         synchronized (replies) {
1067                                 if (!soneRescueMode) {
1068                                         for (PostReply reply : storedSone.getReplies()) {
1069                                                 replies.remove(reply.getId());
1070                                                 if (!sone.getReplies().contains(reply)) {
1071                                                         eventBus.post(new PostReplyRemovedEvent(reply));
1072                                                 }
1073                                         }
1074                                 }
1075                                 Set<PostReply> storedReplies = storedSone.getReplies();
1076                                 synchronized (knownReplies) {
1077                                         for (PostReply reply : sone.getReplies()) {
1078                                                 reply.setKnown(knownReplies.contains(reply.getId()));
1079                                                 if (!storedReplies.contains(reply)) {
1080                                                         if (reply.getTime() < getSoneFollowingTime(sone)) {
1081                                                                 knownReplies.add(reply.getId());
1082                                                                 reply.setKnown(true);
1083                                                         } else if (!knownReplies.contains(reply.getId())) {
1084                                                                 eventBus.post(new NewPostReplyFoundEvent(reply));
1085                                                         }
1086                                                 }
1087                                                 replies.put(reply.getId(), reply);
1088                                         }
1089                                 }
1090                         }
1091                         synchronized (albums) {
1092                                 synchronized (images) {
1093                                         for (Album album : storedSone.getAlbums()) {
1094                                                 albums.remove(album.getId());
1095                                                 for (Image image : album.getImages()) {
1096                                                         images.remove(image.getId());
1097                                                 }
1098                                         }
1099                                         for (Album album : sone.getAlbums()) {
1100                                                 albums.put(album.getId(), album);
1101                                                 for (Image image : album.getImages()) {
1102                                                         images.put(image.getId(), image);
1103                                                 }
1104                                         }
1105                                 }
1106                         }
1107                         synchronized (sones) {
1108                                 sones.put(sone.getId(), sone);
1109                         }
1110                 }
1111         }
1112
1113         /**
1114          * Deletes the given Sone. This will remove the Sone from the
1115          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1116          * remove the context from its identity.
1117          *
1118          * @param sone
1119          *            The Sone to delete
1120          */
1121         public void deleteSone(Sone sone) {
1122                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1123                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1124                         return;
1125                 }
1126                 synchronized (sones) {
1127                         if (!getLocalSones().contains(sone)) {
1128                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1129                                 return;
1130                         }
1131                         sones.remove(sone.getId());
1132                         SoneInserter soneInserter = soneInserters.remove(sone);
1133                         soneInserter.stop();
1134                 }
1135                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1136                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1137                 try {
1138                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1139                 } catch (ConfigurationException ce1) {
1140                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1141                 }
1142         }
1143
1144         /**
1145          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1146          * known} before, a {@link MarkSoneKnownEvent} is fired.
1147          *
1148          * @param sone
1149          *            The Sone to mark as known
1150          */
1151         public void markSoneKnown(Sone sone) {
1152                 if (!sone.isKnown()) {
1153                         sone.setKnown(true);
1154                         synchronized (knownSones) {
1155                                 knownSones.add(sone.getId());
1156                         }
1157                         eventBus.post(new MarkSoneKnownEvent(sone));
1158                         touchConfiguration();
1159                 }
1160         }
1161
1162         /**
1163          * Loads and updates the given Sone from the configuration. If any error is
1164          * encountered, loading is aborted and the given Sone is not changed.
1165          *
1166          * @param sone
1167          *            The Sone to load and update
1168          */
1169         public void loadSone(Sone sone) {
1170                 if (!sone.isLocal()) {
1171                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1172                         return;
1173                 }
1174
1175                 /* initialize options. */
1176                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1177                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1178                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1179                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1180                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1181                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1182
1183                 /* load Sone. */
1184                 String sonePrefix = "Sone/" + sone.getId();
1185                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1186                 if (soneTime == null) {
1187                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1188                         return;
1189                 }
1190                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1191
1192                 /* load profile. */
1193                 Profile profile = new Profile(sone);
1194                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1195                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1196                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1197                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1198                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1199                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1200
1201                 /* load profile fields. */
1202                 while (true) {
1203                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1204                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1205                         if (fieldName == null) {
1206                                 break;
1207                         }
1208                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1209                         profile.addField(fieldName).setValue(fieldValue);
1210                 }
1211
1212                 /* load posts. */
1213                 Set<Post> posts = new HashSet<Post>();
1214                 while (true) {
1215                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1216                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1217                         if (postId == null) {
1218                                 break;
1219                         }
1220                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1221                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1222                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1223                         if ((postTime == 0) || (postText == null)) {
1224                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1225                                 return;
1226                         }
1227                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1228                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1229                                 postBuilder.to(postRecipientId);
1230                         }
1231                         posts.add(postBuilder.build());
1232                 }
1233
1234                 /* load replies. */
1235                 Set<PostReply> replies = new HashSet<PostReply>();
1236                 while (true) {
1237                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1238                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1239                         if (replyId == null) {
1240                                 break;
1241                         }
1242                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1243                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1244                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1245                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1246                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1247                                 return;
1248                         }
1249                         PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1250                         postReplyBuilder.withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1251                         replies.add(postReplyBuilder.build());
1252                 }
1253
1254                 /* load post likes. */
1255                 Set<String> likedPostIds = new HashSet<String>();
1256                 while (true) {
1257                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1258                         if (likedPostId == null) {
1259                                 break;
1260                         }
1261                         likedPostIds.add(likedPostId);
1262                 }
1263
1264                 /* load reply likes. */
1265                 Set<String> likedReplyIds = new HashSet<String>();
1266                 while (true) {
1267                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1268                         if (likedReplyId == null) {
1269                                 break;
1270                         }
1271                         likedReplyIds.add(likedReplyId);
1272                 }
1273
1274                 /* load friends. */
1275                 Set<String> friends = new HashSet<String>();
1276                 while (true) {
1277                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1278                         if (friendId == null) {
1279                                 break;
1280                         }
1281                         friends.add(friendId);
1282                 }
1283
1284                 /* load albums. */
1285                 List<Album> topLevelAlbums = new ArrayList<Album>();
1286                 int albumCounter = 0;
1287                 while (true) {
1288                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1289                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1290                         if (albumId == null) {
1291                                 break;
1292                         }
1293                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1294                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1295                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1296                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1297                         if ((albumTitle == null) || (albumDescription == null)) {
1298                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1299                                 return;
1300                         }
1301                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId);
1302                         if (albumParentId != null) {
1303                                 Album parentAlbum = getAlbum(albumParentId, false);
1304                                 if (parentAlbum == null) {
1305                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1306                                         return;
1307                                 }
1308                                 parentAlbum.addAlbum(album);
1309                         } else {
1310                                 if (!topLevelAlbums.contains(album)) {
1311                                         topLevelAlbums.add(album);
1312                                 }
1313                         }
1314                 }
1315
1316                 /* load images. */
1317                 int imageCounter = 0;
1318                 while (true) {
1319                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1320                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1321                         if (imageId == null) {
1322                                 break;
1323                         }
1324                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1325                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1326                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1327                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1328                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1329                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1330                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1331                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1332                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1333                                 return;
1334                         }
1335                         Album album = getAlbum(albumId, false);
1336                         if (album == null) {
1337                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1338                                 return;
1339                         }
1340                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1341                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1342                         album.addImage(image);
1343                 }
1344
1345                 /* load avatar. */
1346                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1347                 if (avatarId != null) {
1348                         profile.setAvatar(getImage(avatarId, false));
1349                 }
1350
1351                 /* load options. */
1352                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1353                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1354                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1355                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1356                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1357                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1358
1359                 /* if we’re still here, Sone was loaded successfully. */
1360                 synchronized (sone) {
1361                         sone.setTime(soneTime);
1362                         sone.setProfile(profile);
1363                         sone.setPosts(posts);
1364                         sone.setReplies(replies);
1365                         sone.setLikePostIds(likedPostIds);
1366                         sone.setLikeReplyIds(likedReplyIds);
1367                         for (String friendId : friends) {
1368                                 followSone(sone, friendId);
1369                         }
1370                         sone.setAlbums(topLevelAlbums);
1371                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1372                 }
1373                 synchronized (knownSones) {
1374                         for (String friend : friends) {
1375                                 knownSones.add(friend);
1376                         }
1377                 }
1378                 synchronized (this.posts) {
1379                         for (Post post : posts) {
1380                                 this.posts.put(post.getId(), post);
1381                         }
1382                 }
1383                 synchronized (knownPosts) {
1384                         for (Post post : posts) {
1385                                 knownPosts.add(post.getId());
1386                         }
1387                 }
1388                 synchronized (this.replies) {
1389                         for (PostReply postReply : replies) {
1390                                 this.replies.put(postReply.getId(), postReply);
1391                         }
1392                 }
1393                 synchronized (knownReplies) {
1394                         for (PostReply reply : replies) {
1395                                 knownReplies.add(reply.getId());
1396                         }
1397                 }
1398         }
1399
1400         /**
1401          * Creates a new post.
1402          *
1403          * @param sone
1404          *            The Sone that creates the post
1405          * @param text
1406          *            The text of the post
1407          * @return The created post
1408          */
1409         public Post createPost(Sone sone, String text) {
1410                 return createPost(sone, System.currentTimeMillis(), text);
1411         }
1412
1413         /**
1414          * Creates a new post.
1415          *
1416          * @param sone
1417          *            The Sone that creates the post
1418          * @param time
1419          *            The time of the post
1420          * @param text
1421          *            The text of the post
1422          * @return The created post
1423          */
1424         public Post createPost(Sone sone, long time, String text) {
1425                 return createPost(sone, null, time, text);
1426         }
1427
1428         /**
1429          * Creates a new post.
1430          *
1431          * @param sone
1432          *            The Sone that creates the post
1433          * @param recipient
1434          *            The recipient Sone, or {@code null} if this post does not have
1435          *            a recipient
1436          * @param text
1437          *            The text of the post
1438          * @return The created post
1439          */
1440         public Post createPost(Sone sone, Sone recipient, String text) {
1441                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1442         }
1443
1444         /**
1445          * Creates a new post.
1446          *
1447          * @param sone
1448          *            The Sone that creates the post
1449          * @param recipient
1450          *            The recipient Sone, or {@code null} if this post does not have
1451          *            a recipient
1452          * @param time
1453          *            The time of the post
1454          * @param text
1455          *            The text of the post
1456          * @return The created post
1457          */
1458         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1459                 checkNotNull(text, "text must not be null");
1460                 checkArgument(text.trim().length() > 0, "text must not be empty");
1461                 if (!sone.isLocal()) {
1462                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1463                         return null;
1464                 }
1465                 PostBuilder postBuilder = postBuilderFactory.newPostBuilder();
1466                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1467                 if (recipient != null) {
1468                         postBuilder.to(recipient.getId());
1469                 }
1470                 final Post post = postBuilder.build();
1471                 synchronized (posts) {
1472                         posts.put(post.getId(), post);
1473                 }
1474                 eventBus.post(new NewPostFoundEvent(post));
1475                 sone.addPost(post);
1476                 touchConfiguration();
1477                 localElementTicker.schedule(new Runnable() {
1478
1479                         /**
1480                          * {@inheritDoc}
1481                          */
1482                         @Override
1483                         public void run() {
1484                                 markPostKnown(post);
1485                         }
1486                 }, 10, TimeUnit.SECONDS);
1487                 return post;
1488         }
1489
1490         /**
1491          * Deletes the given post.
1492          *
1493          * @param post
1494          *            The post to delete
1495          */
1496         public void deletePost(Post post) {
1497                 if (!post.getSone().isLocal()) {
1498                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1499                         return;
1500                 }
1501                 post.getSone().removePost(post);
1502                 synchronized (posts) {
1503                         posts.remove(post.getId());
1504                 }
1505                 eventBus.post(new PostRemovedEvent(post));
1506                 markPostKnown(post);
1507                 touchConfiguration();
1508         }
1509
1510         /**
1511          * Marks the given post as known, if it is currently not a known post
1512          * (according to {@link Post#isKnown()}).
1513          *
1514          * @param post
1515          *            The post to mark as known
1516          */
1517         public void markPostKnown(Post post) {
1518                 post.setKnown(true);
1519                 synchronized (knownPosts) {
1520                         eventBus.post(new MarkPostKnownEvent(post));
1521                         if (knownPosts.add(post.getId())) {
1522                                 touchConfiguration();
1523                         }
1524                 }
1525                 for (PostReply reply : getReplies(post)) {
1526                         markReplyKnown(reply);
1527                 }
1528         }
1529
1530         /**
1531          * Bookmarks the given post.
1532          *
1533          * @param post
1534          *            The post to bookmark
1535          */
1536         public void bookmark(Post post) {
1537                 bookmarkPost(post.getId());
1538         }
1539
1540         /**
1541          * Bookmarks the post with the given ID.
1542          *
1543          * @param id
1544          *            The ID of the post to bookmark
1545          */
1546         public void bookmarkPost(String id) {
1547                 synchronized (bookmarkedPosts) {
1548                         bookmarkedPosts.add(id);
1549                 }
1550         }
1551
1552         /**
1553          * Removes the given post from the bookmarks.
1554          *
1555          * @param post
1556          *            The post to unbookmark
1557          */
1558         public void unbookmark(Post post) {
1559                 unbookmarkPost(post.getId());
1560         }
1561
1562         /**
1563          * Removes the post with the given ID from the bookmarks.
1564          *
1565          * @param id
1566          *            The ID of the post to unbookmark
1567          */
1568         public void unbookmarkPost(String id) {
1569                 synchronized (bookmarkedPosts) {
1570                         bookmarkedPosts.remove(id);
1571                 }
1572         }
1573
1574         /**
1575          * Creates a new reply.
1576          *
1577          * @param sone
1578          *            The Sone that creates the reply
1579          * @param post
1580          *            The post that this reply refers to
1581          * @param text
1582          *            The text of the reply
1583          * @return The created reply
1584          */
1585         public PostReply createReply(Sone sone, Post post, String text) {
1586                 checkNotNull(text, "text must not be null");
1587                 checkArgument(text.trim().length() > 0, "text must not be empty");
1588                 if (!sone.isLocal()) {
1589                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1590                         return null;
1591                 }
1592                 PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1593                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1594                 final PostReply reply = postReplyBuilder.build();
1595                 synchronized (replies) {
1596                         replies.put(reply.getId(), reply);
1597                 }
1598                 synchronized (knownReplies) {
1599                         eventBus.post(new NewPostReplyFoundEvent(reply));
1600                 }
1601                 sone.addReply(reply);
1602                 touchConfiguration();
1603                 localElementTicker.schedule(new Runnable() {
1604
1605                         /**
1606                          * {@inheritDoc}
1607                          */
1608                         @Override
1609                         public void run() {
1610                                 markReplyKnown(reply);
1611                         }
1612                 }, 10, TimeUnit.SECONDS);
1613                 return reply;
1614         }
1615
1616         /**
1617          * Deletes the given reply.
1618          *
1619          * @param reply
1620          *            The reply to delete
1621          */
1622         public void deleteReply(PostReply reply) {
1623                 Sone sone = reply.getSone();
1624                 if (!sone.isLocal()) {
1625                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1626                         return;
1627                 }
1628                 synchronized (replies) {
1629                         replies.remove(reply.getId());
1630                 }
1631                 synchronized (knownReplies) {
1632                         markReplyKnown(reply);
1633                         knownReplies.remove(reply.getId());
1634                 }
1635                 sone.removeReply(reply);
1636                 touchConfiguration();
1637         }
1638
1639         /**
1640          * Marks the given reply as known, if it is currently not a known reply
1641          * (according to {@link Reply#isKnown()}).
1642          *
1643          * @param reply
1644          *            The reply to mark as known
1645          */
1646         public void markReplyKnown(PostReply reply) {
1647                 reply.setKnown(true);
1648                 synchronized (knownReplies) {
1649                         eventBus.post(new MarkPostReplyKnownEvent(reply));
1650                         if (knownReplies.add(reply.getId())) {
1651                                 touchConfiguration();
1652                         }
1653                 }
1654         }
1655
1656         /**
1657          * Creates a new top-level album for the given Sone.
1658          *
1659          * @param sone
1660          *            The Sone to create the album for
1661          * @return The new album
1662          */
1663         public Album createAlbum(Sone sone) {
1664                 return createAlbum(sone, null);
1665         }
1666
1667         /**
1668          * Creates a new album for the given Sone.
1669          *
1670          * @param sone
1671          *            The Sone to create the album for
1672          * @param parent
1673          *            The parent of the album (may be {@code null} to create a
1674          *            top-level album)
1675          * @return The new album
1676          */
1677         public Album createAlbum(Sone sone, Album parent) {
1678                 Album album = new Album();
1679                 synchronized (albums) {
1680                         albums.put(album.getId(), album);
1681                 }
1682                 album.setSone(sone);
1683                 if (parent != null) {
1684                         parent.addAlbum(album);
1685                 } else {
1686                         sone.addAlbum(album);
1687                 }
1688                 return album;
1689         }
1690
1691         /**
1692          * Deletes the given album. The owner of the album has to be a local Sone,
1693          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1694          *
1695          * @param album
1696          *            The album to remove
1697          */
1698         public void deleteAlbum(Album album) {
1699                 checkNotNull(album, "album must not be null");
1700                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1701                 if (!album.isEmpty()) {
1702                         return;
1703                 }
1704                 if (album.getParent() == null) {
1705                         album.getSone().removeAlbum(album);
1706                 } else {
1707                         album.getParent().removeAlbum(album);
1708                 }
1709                 synchronized (albums) {
1710                         albums.remove(album.getId());
1711                 }
1712                 touchConfiguration();
1713         }
1714
1715         /**
1716          * Creates a new image.
1717          *
1718          * @param sone
1719          *            The Sone creating the image
1720          * @param album
1721          *            The album the image will be inserted into
1722          * @param temporaryImage
1723          *            The temporary image to create the image from
1724          * @return The newly created image
1725          */
1726         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1727                 checkNotNull(sone, "sone must not be null");
1728                 checkNotNull(album, "album must not be null");
1729                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1730                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1731                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1732                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1733                 album.addImage(image);
1734                 synchronized (images) {
1735                         images.put(image.getId(), image);
1736                 }
1737                 imageInserter.insertImage(temporaryImage, image);
1738                 return image;
1739         }
1740
1741         /**
1742          * Deletes the given image. This method will also delete a matching
1743          * temporary image.
1744          *
1745          * @see #deleteTemporaryImage(TemporaryImage)
1746          * @param image
1747          *            The image to delete
1748          */
1749         public void deleteImage(Image image) {
1750                 checkNotNull(image, "image must not be null");
1751                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1752                 deleteTemporaryImage(image.getId());
1753                 image.getAlbum().removeImage(image);
1754                 synchronized (images) {
1755                         images.remove(image.getId());
1756                 }
1757                 touchConfiguration();
1758         }
1759
1760         /**
1761          * Creates a new temporary image.
1762          *
1763          * @param mimeType
1764          *            The MIME type of the temporary image
1765          * @param imageData
1766          *            The encoded data of the image
1767          * @return The temporary image
1768          */
1769         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1770                 TemporaryImage temporaryImage = new TemporaryImage();
1771                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1772                 synchronized (temporaryImages) {
1773                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1774                 }
1775                 return temporaryImage;
1776         }
1777
1778         /**
1779          * Deletes the given temporary image.
1780          *
1781          * @param temporaryImage
1782          *            The temporary image to delete
1783          */
1784         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1785                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1786                 deleteTemporaryImage(temporaryImage.getId());
1787         }
1788
1789         /**
1790          * Deletes the temporary image with the given ID.
1791          *
1792          * @param imageId
1793          *            The ID of the temporary image to delete
1794          */
1795         public void deleteTemporaryImage(String imageId) {
1796                 checkNotNull(imageId, "imageId must not be null");
1797                 synchronized (temporaryImages) {
1798                         temporaryImages.remove(imageId);
1799                 }
1800                 Image image = getImage(imageId, false);
1801                 if (image != null) {
1802                         imageInserter.cancelImageInsert(image);
1803                 }
1804         }
1805
1806         /**
1807          * Notifies the core that the configuration, either of the core or of a
1808          * single local Sone, has changed, and that the configuration should be
1809          * saved.
1810          */
1811         public void touchConfiguration() {
1812                 lastConfigurationUpdate = System.currentTimeMillis();
1813         }
1814
1815         //
1816         // SERVICE METHODS
1817         //
1818
1819         /**
1820          * Starts the core.
1821          */
1822         @Override
1823         public void serviceStart() {
1824                 loadConfiguration();
1825                 updateChecker.start();
1826                 identityManager.start();
1827                 webOfTrustUpdater.init();
1828                 webOfTrustUpdater.start();
1829         }
1830
1831         /**
1832          * {@inheritDoc}
1833          */
1834         @Override
1835         public void serviceRun() {
1836                 long lastSaved = System.currentTimeMillis();
1837                 while (!shouldStop()) {
1838                         sleep(1000);
1839                         long now = System.currentTimeMillis();
1840                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1841                                 for (Sone localSone : getLocalSones()) {
1842                                         saveSone(localSone);
1843                                 }
1844                                 saveConfiguration();
1845                                 lastSaved = now;
1846                         }
1847                 }
1848         }
1849
1850         /**
1851          * Stops the core.
1852          */
1853         @Override
1854         public void serviceStop() {
1855                 localElementTicker.shutdownNow();
1856                 synchronized (sones) {
1857                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1858                                 soneInserter.getValue().stop();
1859                                 saveSone(soneInserter.getKey());
1860                         }
1861                 }
1862                 saveConfiguration();
1863                 webOfTrustUpdater.stop();
1864                 updateChecker.stop();
1865                 soneDownloader.stop();
1866                 soneDownloaders.shutdown();
1867                 identityManager.stop();
1868         }
1869
1870         //
1871         // PRIVATE METHODS
1872         //
1873
1874         /**
1875          * Saves the given Sone. This will persist all local settings for the given
1876          * Sone, such as the friends list and similar, private options.
1877          *
1878          * @param sone
1879          *            The Sone to save
1880          */
1881         private synchronized void saveSone(Sone sone) {
1882                 if (!sone.isLocal()) {
1883                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1884                         return;
1885                 }
1886                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1887                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1888                         return;
1889                 }
1890
1891                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1892                 try {
1893                         /* save Sone into configuration. */
1894                         String sonePrefix = "Sone/" + sone.getId();
1895                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1896                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1897
1898                         /* save profile. */
1899                         Profile profile = sone.getProfile();
1900                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1901                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1902                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1903                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1904                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1905                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1906                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1907
1908                         /* save profile fields. */
1909                         int fieldCounter = 0;
1910                         for (Field profileField : profile.getFields()) {
1911                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1912                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1913                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1914                         }
1915                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1916
1917                         /* save posts. */
1918                         int postCounter = 0;
1919                         for (Post post : sone.getPosts()) {
1920                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1921                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1922                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1923                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1924                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1925                         }
1926                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1927
1928                         /* save replies. */
1929                         int replyCounter = 0;
1930                         for (PostReply reply : sone.getReplies()) {
1931                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1932                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1933                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1934                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1935                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1936                         }
1937                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1938
1939                         /* save post likes. */
1940                         int postLikeCounter = 0;
1941                         for (String postId : sone.getLikedPostIds()) {
1942                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1943                         }
1944                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1945
1946                         /* save reply likes. */
1947                         int replyLikeCounter = 0;
1948                         for (String replyId : sone.getLikedReplyIds()) {
1949                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1950                         }
1951                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1952
1953                         /* save friends. */
1954                         int friendCounter = 0;
1955                         for (String friendId : sone.getFriends()) {
1956                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1957                         }
1958                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1959
1960                         /* save albums. first, collect in a flat structure, top-level first. */
1961                         List<Album> albums = sone.getAllAlbums();
1962
1963                         int albumCounter = 0;
1964                         for (Album album : albums) {
1965                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1966                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1967                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1968                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1969                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
1970                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1971                         }
1972                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1973
1974                         /* save images. */
1975                         int imageCounter = 0;
1976                         for (Album album : albums) {
1977                                 for (Image image : album.getImages()) {
1978                                         if (!image.isInserted()) {
1979                                                 continue;
1980                                         }
1981                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1982                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1983                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1984                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1985                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1986                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1987                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1988                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1989                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1990                                 }
1991                         }
1992                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1993
1994                         /* save options. */
1995                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1996                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1997                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1998                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1999                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
2000                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
2001
2002                         configuration.save();
2003
2004                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
2005
2006                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
2007                 } catch (ConfigurationException ce1) {
2008                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
2009                 }
2010         }
2011
2012         /**
2013          * Saves the current options.
2014          */
2015         private void saveConfiguration() {
2016                 synchronized (configuration) {
2017                         if (storingConfiguration) {
2018                                 logger.log(Level.FINE, "Already storing configuration…");
2019                                 return;
2020                         }
2021                         storingConfiguration = true;
2022                 }
2023
2024                 /* store the options first. */
2025                 try {
2026                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
2027                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
2028                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
2029                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
2030                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
2031                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
2032                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
2033                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
2034                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
2035                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
2036                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
2037                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
2038
2039                         /* save known Sones. */
2040                         int soneCounter = 0;
2041                         synchronized (knownSones) {
2042                                 for (String knownSoneId : knownSones) {
2043                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
2044                                 }
2045                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
2046                         }
2047
2048                         /* save Sone following times. */
2049                         soneCounter = 0;
2050                         synchronized (soneFollowingTimes) {
2051                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
2052                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
2053                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
2054                                         ++soneCounter;
2055                                 }
2056                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
2057                         }
2058
2059                         /* save known posts. */
2060                         int postCounter = 0;
2061                         synchronized (knownPosts) {
2062                                 for (String knownPostId : knownPosts) {
2063                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
2064                                 }
2065                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
2066                         }
2067
2068                         /* save known replies. */
2069                         int replyCounter = 0;
2070                         synchronized (knownReplies) {
2071                                 for (String knownReplyId : knownReplies) {
2072                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
2073                                 }
2074                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
2075                         }
2076
2077                         /* save bookmarked posts. */
2078                         int bookmarkedPostCounter = 0;
2079                         synchronized (bookmarkedPosts) {
2080                                 for (String bookmarkedPostId : bookmarkedPosts) {
2081                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
2082                                 }
2083                         }
2084                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
2085
2086                         /* now save it. */
2087                         configuration.save();
2088
2089                 } catch (ConfigurationException ce1) {
2090                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2091                 } finally {
2092                         synchronized (configuration) {
2093                                 storingConfiguration = false;
2094                         }
2095                 }
2096         }
2097
2098         /**
2099          * Loads the configuration.
2100          */
2101         @SuppressWarnings("unchecked")
2102         private void loadConfiguration() {
2103                 /* create options. */
2104                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
2105
2106                         @Override
2107                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2108                                 SoneInserter.setInsertionDelay(newValue);
2109                         }
2110
2111                 }));
2112                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2113                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2114                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2115                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2116                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
2117                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
2118                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
2119                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2120                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
2121
2122                         @Override
2123                         @SuppressWarnings("synthetic-access")
2124                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
2125                                 fcpInterface.setActive(newValue);
2126                         }
2127                 }));
2128                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
2129
2130                         @Override
2131                         @SuppressWarnings("synthetic-access")
2132                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2133                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
2134                         }
2135
2136                 }));
2137
2138                 loadConfigurationValue("InsertionDelay");
2139                 loadConfigurationValue("PostsPerPage");
2140                 loadConfigurationValue("ImagesPerPage");
2141                 loadConfigurationValue("CharactersPerPost");
2142                 loadConfigurationValue("PostCutOffLength");
2143                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2144                 loadConfigurationValue("PositiveTrust");
2145                 loadConfigurationValue("NegativeTrust");
2146                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2147                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2148                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2149
2150                 /* load known Sones. */
2151                 int soneCounter = 0;
2152                 while (true) {
2153                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2154                         if (knownSoneId == null) {
2155                                 break;
2156                         }
2157                         synchronized (knownSones) {
2158                                 knownSones.add(knownSoneId);
2159                         }
2160                 }
2161
2162                 /* load Sone following times. */
2163                 soneCounter = 0;
2164                 while (true) {
2165                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2166                         if (soneId == null) {
2167                                 break;
2168                         }
2169                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2170                         Sone followedSone = getSone(soneId);
2171                         if (followedSone == null) {
2172                                 logger.log(Level.WARNING, String.format("Ignoring Sone with invalid ID: %s", soneId));
2173                         } else {
2174                                 synchronized (soneFollowingTimes) {
2175                                         soneFollowingTimes.put(soneId, time);
2176                                 }
2177                         }
2178                         ++soneCounter;
2179                 }
2180
2181                 /* load known posts. */
2182                 int postCounter = 0;
2183                 while (true) {
2184                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2185                         if (knownPostId == null) {
2186                                 break;
2187                         }
2188                         synchronized (knownPosts) {
2189                                 knownPosts.add(knownPostId);
2190                         }
2191                 }
2192
2193                 /* load known replies. */
2194                 int replyCounter = 0;
2195                 while (true) {
2196                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2197                         if (knownReplyId == null) {
2198                                 break;
2199                         }
2200                         synchronized (knownReplies) {
2201                                 knownReplies.add(knownReplyId);
2202                         }
2203                 }
2204
2205                 /* load bookmarked posts. */
2206                 int bookmarkedPostCounter = 0;
2207                 while (true) {
2208                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2209                         if (bookmarkedPostId == null) {
2210                                 break;
2211                         }
2212                         synchronized (bookmarkedPosts) {
2213                                 bookmarkedPosts.add(bookmarkedPostId);
2214                         }
2215                 }
2216
2217         }
2218
2219         /**
2220          * Loads an {@link Integer} configuration value for the option with the
2221          * given name, logging validation failures.
2222          *
2223          * @param optionName
2224          *            The name of the option to load
2225          */
2226         private void loadConfigurationValue(String optionName) {
2227                 try {
2228                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2229                 } catch (IllegalArgumentException iae1) {
2230                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2231                 }
2232         }
2233
2234         /**
2235          * Notifies the core that a new {@link OwnIdentity} was added.
2236          *
2237          * @param ownIdentityAddedEvent
2238          *            The event
2239          */
2240         @Subscribe
2241         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2242                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2243                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2244                 if (ownIdentity.hasContext("Sone")) {
2245                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2246                         addLocalSone(ownIdentity);
2247                 }
2248         }
2249
2250         /**
2251          * Notifies the core that an {@link OwnIdentity} was removed.
2252          *
2253          * @param ownIdentityRemovedEvent
2254          *            The event
2255          */
2256         @Subscribe
2257         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2258                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2259                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2260                 trustedIdentities.remove(ownIdentity);
2261         }
2262
2263         /**
2264          * Notifies the core that a new {@link Identity} was added.
2265          *
2266          * @param identityAddedEvent
2267          *            The event
2268          */
2269         @Subscribe
2270         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2271                 Identity identity = identityAddedEvent.identity();
2272                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2273                 trustedIdentities.get(identityAddedEvent.ownIdentity()).add(identity);
2274                 addRemoteSone(identity);
2275         }
2276
2277         /**
2278          * Notifies the core that an {@link Identity} was updated.
2279          *
2280          * @param identityUpdatedEvent
2281          *            The event
2282          */
2283         @Subscribe
2284         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2285                 final Identity identity = identityUpdatedEvent.identity();
2286                 soneDownloaders.execute(new Runnable() {
2287
2288                         @Override
2289                         @SuppressWarnings("synthetic-access")
2290                         public void run() {
2291                                 Sone sone = getRemoteSone(identity.getId(), false);
2292                                 sone.setIdentity(identity);
2293                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2294                                 soneDownloader.addSone(sone);
2295                                 soneDownloader.fetchSone(sone);
2296                         }
2297                 });
2298         }
2299
2300         /**
2301          * Notifies the core that an {@link Identity} was removed.
2302          *
2303          * @param identityRemovedEvent
2304          *            The event
2305          */
2306         @Subscribe
2307         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2308                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2309                 Identity identity = identityRemovedEvent.identity();
2310                 trustedIdentities.get(ownIdentity).remove(identity);
2311                 boolean foundIdentity = false;
2312                 for (Entry<OwnIdentity, Set<Identity>> trustedIdentity : trustedIdentities.entrySet()) {
2313                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2314                                 continue;
2315                         }
2316                         if (trustedIdentity.getValue().contains(identity)) {
2317                                 foundIdentity = true;
2318                         }
2319                 }
2320                 if (foundIdentity) {
2321                         /* some local identity still trusts this identity, don’t remove. */
2322                         return;
2323                 }
2324                 Sone sone = getSone(identity.getId());
2325                 if (sone == null) {
2326                         /* TODO - we don’t have the Sone anymore. should this happen? */
2327                         return;
2328                 }
2329                 synchronized (posts) {
2330                         synchronized (knownPosts) {
2331                                 for (Post post : sone.getPosts()) {
2332                                         posts.remove(post.getId());
2333                                         eventBus.post(new PostRemovedEvent(post));
2334                                 }
2335                         }
2336                 }
2337                 synchronized (replies) {
2338                         synchronized (knownReplies) {
2339                                 for (PostReply reply : sone.getReplies()) {
2340                                         replies.remove(reply.getId());
2341                                         eventBus.post(new PostReplyRemovedEvent(reply));
2342                                 }
2343                         }
2344                 }
2345                 synchronized (sones) {
2346                         sones.remove(identity.getId());
2347                 }
2348                 eventBus.post(new SoneRemovedEvent(sone));
2349         }
2350
2351         /**
2352          * Deletes the temporary image.
2353          *
2354          * @param imageInsertFinishedEvent
2355          *            The event
2356          */
2357         @Subscribe
2358         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2359                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2360                 imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
2361                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2362                 touchConfiguration();
2363         }
2364
2365 }