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 (knownPosts) {
1379                         for (Post post : posts) {
1380                                 knownPosts.add(post.getId());
1381                         }
1382                 }
1383                 synchronized (knownReplies) {
1384                         for (PostReply reply : replies) {
1385                                 knownReplies.add(reply.getId());
1386                         }
1387                 }
1388         }
1389
1390         /**
1391          * Creates a new post.
1392          *
1393          * @param sone
1394          *            The Sone that creates the post
1395          * @param text
1396          *            The text of the post
1397          * @return The created post
1398          */
1399         public Post createPost(Sone sone, String text) {
1400                 return createPost(sone, System.currentTimeMillis(), text);
1401         }
1402
1403         /**
1404          * Creates a new post.
1405          *
1406          * @param sone
1407          *            The Sone that creates the post
1408          * @param time
1409          *            The time of the post
1410          * @param text
1411          *            The text of the post
1412          * @return The created post
1413          */
1414         public Post createPost(Sone sone, long time, String text) {
1415                 return createPost(sone, null, time, text);
1416         }
1417
1418         /**
1419          * Creates a new post.
1420          *
1421          * @param sone
1422          *            The Sone that creates the post
1423          * @param recipient
1424          *            The recipient Sone, or {@code null} if this post does not have
1425          *            a recipient
1426          * @param text
1427          *            The text of the post
1428          * @return The created post
1429          */
1430         public Post createPost(Sone sone, Sone recipient, String text) {
1431                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1432         }
1433
1434         /**
1435          * Creates a new post.
1436          *
1437          * @param sone
1438          *            The Sone that creates the post
1439          * @param recipient
1440          *            The recipient Sone, or {@code null} if this post does not have
1441          *            a recipient
1442          * @param time
1443          *            The time of the post
1444          * @param text
1445          *            The text of the post
1446          * @return The created post
1447          */
1448         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1449                 checkNotNull(text, "text must not be null");
1450                 checkArgument(text.trim().length() > 0, "text must not be empty");
1451                 if (!sone.isLocal()) {
1452                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1453                         return null;
1454                 }
1455                 PostBuilder postBuilder = postBuilderFactory.newPostBuilder();
1456                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1457                 if (recipient != null) {
1458                         postBuilder.to(recipient.getId());
1459                 }
1460                 final Post post = postBuilder.build();
1461                 synchronized (posts) {
1462                         posts.put(post.getId(), post);
1463                 }
1464                 eventBus.post(new NewPostFoundEvent(post));
1465                 sone.addPost(post);
1466                 touchConfiguration();
1467                 localElementTicker.schedule(new Runnable() {
1468
1469                         /**
1470                          * {@inheritDoc}
1471                          */
1472                         @Override
1473                         public void run() {
1474                                 markPostKnown(post);
1475                         }
1476                 }, 10, TimeUnit.SECONDS);
1477                 return post;
1478         }
1479
1480         /**
1481          * Deletes the given post.
1482          *
1483          * @param post
1484          *            The post to delete
1485          */
1486         public void deletePost(Post post) {
1487                 if (!post.getSone().isLocal()) {
1488                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1489                         return;
1490                 }
1491                 post.getSone().removePost(post);
1492                 synchronized (posts) {
1493                         posts.remove(post.getId());
1494                 }
1495                 eventBus.post(new PostRemovedEvent(post));
1496                 markPostKnown(post);
1497                 touchConfiguration();
1498         }
1499
1500         /**
1501          * Marks the given post as known, if it is currently not a known post
1502          * (according to {@link Post#isKnown()}).
1503          *
1504          * @param post
1505          *            The post to mark as known
1506          */
1507         public void markPostKnown(Post post) {
1508                 post.setKnown(true);
1509                 synchronized (knownPosts) {
1510                         eventBus.post(new MarkPostKnownEvent(post));
1511                         if (knownPosts.add(post.getId())) {
1512                                 touchConfiguration();
1513                         }
1514                 }
1515                 for (PostReply reply : getReplies(post)) {
1516                         markReplyKnown(reply);
1517                 }
1518         }
1519
1520         /**
1521          * Bookmarks the given post.
1522          *
1523          * @param post
1524          *            The post to bookmark
1525          */
1526         public void bookmark(Post post) {
1527                 bookmarkPost(post.getId());
1528         }
1529
1530         /**
1531          * Bookmarks the post with the given ID.
1532          *
1533          * @param id
1534          *            The ID of the post to bookmark
1535          */
1536         public void bookmarkPost(String id) {
1537                 synchronized (bookmarkedPosts) {
1538                         bookmarkedPosts.add(id);
1539                 }
1540         }
1541
1542         /**
1543          * Removes the given post from the bookmarks.
1544          *
1545          * @param post
1546          *            The post to unbookmark
1547          */
1548         public void unbookmark(Post post) {
1549                 unbookmarkPost(post.getId());
1550         }
1551
1552         /**
1553          * Removes the post with the given ID from the bookmarks.
1554          *
1555          * @param id
1556          *            The ID of the post to unbookmark
1557          */
1558         public void unbookmarkPost(String id) {
1559                 synchronized (bookmarkedPosts) {
1560                         bookmarkedPosts.remove(id);
1561                 }
1562         }
1563
1564         /**
1565          * Creates a new reply.
1566          *
1567          * @param sone
1568          *            The Sone that creates the reply
1569          * @param post
1570          *            The post that this reply refers to
1571          * @param text
1572          *            The text of the reply
1573          * @return The created reply
1574          */
1575         public PostReply createReply(Sone sone, Post post, String text) {
1576                 checkNotNull(text, "text must not be null");
1577                 checkArgument(text.trim().length() > 0, "text must not be empty");
1578                 if (!sone.isLocal()) {
1579                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1580                         return null;
1581                 }
1582                 PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1583                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1584                 final PostReply reply = postReplyBuilder.build();
1585                 synchronized (replies) {
1586                         replies.put(reply.getId(), reply);
1587                 }
1588                 synchronized (knownReplies) {
1589                         eventBus.post(new NewPostReplyFoundEvent(reply));
1590                 }
1591                 sone.addReply(reply);
1592                 touchConfiguration();
1593                 localElementTicker.schedule(new Runnable() {
1594
1595                         /**
1596                          * {@inheritDoc}
1597                          */
1598                         @Override
1599                         public void run() {
1600                                 markReplyKnown(reply);
1601                         }
1602                 }, 10, TimeUnit.SECONDS);
1603                 return reply;
1604         }
1605
1606         /**
1607          * Deletes the given reply.
1608          *
1609          * @param reply
1610          *            The reply to delete
1611          */
1612         public void deleteReply(PostReply reply) {
1613                 Sone sone = reply.getSone();
1614                 if (!sone.isLocal()) {
1615                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1616                         return;
1617                 }
1618                 synchronized (replies) {
1619                         replies.remove(reply.getId());
1620                 }
1621                 synchronized (knownReplies) {
1622                         markReplyKnown(reply);
1623                         knownReplies.remove(reply.getId());
1624                 }
1625                 sone.removeReply(reply);
1626                 touchConfiguration();
1627         }
1628
1629         /**
1630          * Marks the given reply as known, if it is currently not a known reply
1631          * (according to {@link Reply#isKnown()}).
1632          *
1633          * @param reply
1634          *            The reply to mark as known
1635          */
1636         public void markReplyKnown(PostReply reply) {
1637                 reply.setKnown(true);
1638                 synchronized (knownReplies) {
1639                         eventBus.post(new MarkPostReplyKnownEvent(reply));
1640                         if (knownReplies.add(reply.getId())) {
1641                                 touchConfiguration();
1642                         }
1643                 }
1644         }
1645
1646         /**
1647          * Creates a new top-level album for the given Sone.
1648          *
1649          * @param sone
1650          *            The Sone to create the album for
1651          * @return The new album
1652          */
1653         public Album createAlbum(Sone sone) {
1654                 return createAlbum(sone, null);
1655         }
1656
1657         /**
1658          * Creates a new album for the given Sone.
1659          *
1660          * @param sone
1661          *            The Sone to create the album for
1662          * @param parent
1663          *            The parent of the album (may be {@code null} to create a
1664          *            top-level album)
1665          * @return The new album
1666          */
1667         public Album createAlbum(Sone sone, Album parent) {
1668                 Album album = new Album();
1669                 synchronized (albums) {
1670                         albums.put(album.getId(), album);
1671                 }
1672                 album.setSone(sone);
1673                 if (parent != null) {
1674                         parent.addAlbum(album);
1675                 } else {
1676                         sone.addAlbum(album);
1677                 }
1678                 return album;
1679         }
1680
1681         /**
1682          * Deletes the given album. The owner of the album has to be a local Sone,
1683          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1684          *
1685          * @param album
1686          *            The album to remove
1687          */
1688         public void deleteAlbum(Album album) {
1689                 checkNotNull(album, "album must not be null");
1690                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1691                 if (!album.isEmpty()) {
1692                         return;
1693                 }
1694                 if (album.getParent() == null) {
1695                         album.getSone().removeAlbum(album);
1696                 } else {
1697                         album.getParent().removeAlbum(album);
1698                 }
1699                 synchronized (albums) {
1700                         albums.remove(album.getId());
1701                 }
1702                 touchConfiguration();
1703         }
1704
1705         /**
1706          * Creates a new image.
1707          *
1708          * @param sone
1709          *            The Sone creating the image
1710          * @param album
1711          *            The album the image will be inserted into
1712          * @param temporaryImage
1713          *            The temporary image to create the image from
1714          * @return The newly created image
1715          */
1716         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1717                 checkNotNull(sone, "sone must not be null");
1718                 checkNotNull(album, "album must not be null");
1719                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1720                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1721                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1722                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1723                 album.addImage(image);
1724                 synchronized (images) {
1725                         images.put(image.getId(), image);
1726                 }
1727                 imageInserter.insertImage(temporaryImage, image);
1728                 return image;
1729         }
1730
1731         /**
1732          * Deletes the given image. This method will also delete a matching
1733          * temporary image.
1734          *
1735          * @see #deleteTemporaryImage(TemporaryImage)
1736          * @param image
1737          *            The image to delete
1738          */
1739         public void deleteImage(Image image) {
1740                 checkNotNull(image, "image must not be null");
1741                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1742                 deleteTemporaryImage(image.getId());
1743                 image.getAlbum().removeImage(image);
1744                 synchronized (images) {
1745                         images.remove(image.getId());
1746                 }
1747                 touchConfiguration();
1748         }
1749
1750         /**
1751          * Creates a new temporary image.
1752          *
1753          * @param mimeType
1754          *            The MIME type of the temporary image
1755          * @param imageData
1756          *            The encoded data of the image
1757          * @return The temporary image
1758          */
1759         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1760                 TemporaryImage temporaryImage = new TemporaryImage();
1761                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1762                 synchronized (temporaryImages) {
1763                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1764                 }
1765                 return temporaryImage;
1766         }
1767
1768         /**
1769          * Deletes the given temporary image.
1770          *
1771          * @param temporaryImage
1772          *            The temporary image to delete
1773          */
1774         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1775                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1776                 deleteTemporaryImage(temporaryImage.getId());
1777         }
1778
1779         /**
1780          * Deletes the temporary image with the given ID.
1781          *
1782          * @param imageId
1783          *            The ID of the temporary image to delete
1784          */
1785         public void deleteTemporaryImage(String imageId) {
1786                 checkNotNull(imageId, "imageId must not be null");
1787                 synchronized (temporaryImages) {
1788                         temporaryImages.remove(imageId);
1789                 }
1790                 Image image = getImage(imageId, false);
1791                 if (image != null) {
1792                         imageInserter.cancelImageInsert(image);
1793                 }
1794         }
1795
1796         /**
1797          * Notifies the core that the configuration, either of the core or of a
1798          * single local Sone, has changed, and that the configuration should be
1799          * saved.
1800          */
1801         public void touchConfiguration() {
1802                 lastConfigurationUpdate = System.currentTimeMillis();
1803         }
1804
1805         //
1806         // SERVICE METHODS
1807         //
1808
1809         /**
1810          * Starts the core.
1811          */
1812         @Override
1813         public void serviceStart() {
1814                 loadConfiguration();
1815                 updateChecker.start();
1816                 identityManager.start();
1817                 webOfTrustUpdater.init();
1818                 webOfTrustUpdater.start();
1819         }
1820
1821         /**
1822          * {@inheritDoc}
1823          */
1824         @Override
1825         public void serviceRun() {
1826                 long lastSaved = System.currentTimeMillis();
1827                 while (!shouldStop()) {
1828                         sleep(1000);
1829                         long now = System.currentTimeMillis();
1830                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1831                                 for (Sone localSone : getLocalSones()) {
1832                                         saveSone(localSone);
1833                                 }
1834                                 saveConfiguration();
1835                                 lastSaved = now;
1836                         }
1837                 }
1838         }
1839
1840         /**
1841          * Stops the core.
1842          */
1843         @Override
1844         public void serviceStop() {
1845                 localElementTicker.shutdownNow();
1846                 synchronized (sones) {
1847                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1848                                 soneInserter.getValue().stop();
1849                                 saveSone(soneInserter.getKey());
1850                         }
1851                 }
1852                 saveConfiguration();
1853                 webOfTrustUpdater.stop();
1854                 updateChecker.stop();
1855                 soneDownloader.stop();
1856                 soneDownloaders.shutdown();
1857                 identityManager.stop();
1858         }
1859
1860         //
1861         // PRIVATE METHODS
1862         //
1863
1864         /**
1865          * Saves the given Sone. This will persist all local settings for the given
1866          * Sone, such as the friends list and similar, private options.
1867          *
1868          * @param sone
1869          *            The Sone to save
1870          */
1871         private synchronized void saveSone(Sone sone) {
1872                 if (!sone.isLocal()) {
1873                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1874                         return;
1875                 }
1876                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1877                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1878                         return;
1879                 }
1880
1881                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1882                 try {
1883                         /* save Sone into configuration. */
1884                         String sonePrefix = "Sone/" + sone.getId();
1885                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1886                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1887
1888                         /* save profile. */
1889                         Profile profile = sone.getProfile();
1890                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1891                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1892                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1893                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1894                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1895                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1896                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1897
1898                         /* save profile fields. */
1899                         int fieldCounter = 0;
1900                         for (Field profileField : profile.getFields()) {
1901                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1902                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1903                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1904                         }
1905                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1906
1907                         /* save posts. */
1908                         int postCounter = 0;
1909                         for (Post post : sone.getPosts()) {
1910                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1911                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1912                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1913                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1914                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1915                         }
1916                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1917
1918                         /* save replies. */
1919                         int replyCounter = 0;
1920                         for (PostReply reply : sone.getReplies()) {
1921                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1922                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1923                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1924                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1925                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1926                         }
1927                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1928
1929                         /* save post likes. */
1930                         int postLikeCounter = 0;
1931                         for (String postId : sone.getLikedPostIds()) {
1932                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1933                         }
1934                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1935
1936                         /* save reply likes. */
1937                         int replyLikeCounter = 0;
1938                         for (String replyId : sone.getLikedReplyIds()) {
1939                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1940                         }
1941                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1942
1943                         /* save friends. */
1944                         int friendCounter = 0;
1945                         for (String friendId : sone.getFriends()) {
1946                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1947                         }
1948                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1949
1950                         /* save albums. first, collect in a flat structure, top-level first. */
1951                         List<Album> albums = sone.getAllAlbums();
1952
1953                         int albumCounter = 0;
1954                         for (Album album : albums) {
1955                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1956                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1957                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1958                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1959                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
1960                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
1961                         }
1962                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1963
1964                         /* save images. */
1965                         int imageCounter = 0;
1966                         for (Album album : albums) {
1967                                 for (Image image : album.getImages()) {
1968                                         if (!image.isInserted()) {
1969                                                 continue;
1970                                         }
1971                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1972                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1973                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1974                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1975                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1976                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1977                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1978                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1979                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1980                                 }
1981                         }
1982                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1983
1984                         /* save options. */
1985                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1986                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
1987                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
1988                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
1989                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
1990                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
1991
1992                         configuration.save();
1993
1994                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1995
1996                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
1997                 } catch (ConfigurationException ce1) {
1998                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
1999                 }
2000         }
2001
2002         /**
2003          * Saves the current options.
2004          */
2005         private void saveConfiguration() {
2006                 synchronized (configuration) {
2007                         if (storingConfiguration) {
2008                                 logger.log(Level.FINE, "Already storing configuration…");
2009                                 return;
2010                         }
2011                         storingConfiguration = true;
2012                 }
2013
2014                 /* store the options first. */
2015                 try {
2016                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
2017                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
2018                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
2019                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
2020                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
2021                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
2022                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
2023                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
2024                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
2025                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
2026                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
2027                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
2028
2029                         /* save known Sones. */
2030                         int soneCounter = 0;
2031                         synchronized (knownSones) {
2032                                 for (String knownSoneId : knownSones) {
2033                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
2034                                 }
2035                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
2036                         }
2037
2038                         /* save Sone following times. */
2039                         soneCounter = 0;
2040                         synchronized (soneFollowingTimes) {
2041                                 for (Entry<String, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
2042                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey());
2043                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
2044                                         ++soneCounter;
2045                                 }
2046                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
2047                         }
2048
2049                         /* save known posts. */
2050                         int postCounter = 0;
2051                         synchronized (knownPosts) {
2052                                 for (String knownPostId : knownPosts) {
2053                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
2054                                 }
2055                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
2056                         }
2057
2058                         /* save known replies. */
2059                         int replyCounter = 0;
2060                         synchronized (knownReplies) {
2061                                 for (String knownReplyId : knownReplies) {
2062                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
2063                                 }
2064                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
2065                         }
2066
2067                         /* save bookmarked posts. */
2068                         int bookmarkedPostCounter = 0;
2069                         synchronized (bookmarkedPosts) {
2070                                 for (String bookmarkedPostId : bookmarkedPosts) {
2071                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
2072                                 }
2073                         }
2074                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
2075
2076                         /* now save it. */
2077                         configuration.save();
2078
2079                 } catch (ConfigurationException ce1) {
2080                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2081                 } finally {
2082                         synchronized (configuration) {
2083                                 storingConfiguration = false;
2084                         }
2085                 }
2086         }
2087
2088         /**
2089          * Loads the configuration.
2090          */
2091         @SuppressWarnings("unchecked")
2092         private void loadConfiguration() {
2093                 /* create options. */
2094                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
2095
2096                         @Override
2097                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2098                                 SoneInserter.setInsertionDelay(newValue);
2099                         }
2100
2101                 }));
2102                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2103                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2104                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2105                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2106                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
2107                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
2108                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
2109                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2110                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
2111
2112                         @Override
2113                         @SuppressWarnings("synthetic-access")
2114                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
2115                                 fcpInterface.setActive(newValue);
2116                         }
2117                 }));
2118                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
2119
2120                         @Override
2121                         @SuppressWarnings("synthetic-access")
2122                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2123                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
2124                         }
2125
2126                 }));
2127
2128                 loadConfigurationValue("InsertionDelay");
2129                 loadConfigurationValue("PostsPerPage");
2130                 loadConfigurationValue("ImagesPerPage");
2131                 loadConfigurationValue("CharactersPerPost");
2132                 loadConfigurationValue("PostCutOffLength");
2133                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2134                 loadConfigurationValue("PositiveTrust");
2135                 loadConfigurationValue("NegativeTrust");
2136                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2137                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2138                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2139
2140                 /* load known Sones. */
2141                 int soneCounter = 0;
2142                 while (true) {
2143                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2144                         if (knownSoneId == null) {
2145                                 break;
2146                         }
2147                         synchronized (knownSones) {
2148                                 knownSones.add(knownSoneId);
2149                         }
2150                 }
2151
2152                 /* load Sone following times. */
2153                 soneCounter = 0;
2154                 while (true) {
2155                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2156                         if (soneId == null) {
2157                                 break;
2158                         }
2159                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2160                         Sone followedSone = getSone(soneId);
2161                         if (followedSone == null) {
2162                                 logger.log(Level.WARNING, String.format("Ignoring Sone with invalid ID: %s", soneId));
2163                         } else {
2164                                 synchronized (soneFollowingTimes) {
2165                                         soneFollowingTimes.put(soneId, time);
2166                                 }
2167                         }
2168                         ++soneCounter;
2169                 }
2170
2171                 /* load known posts. */
2172                 int postCounter = 0;
2173                 while (true) {
2174                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2175                         if (knownPostId == null) {
2176                                 break;
2177                         }
2178                         synchronized (knownPosts) {
2179                                 knownPosts.add(knownPostId);
2180                         }
2181                 }
2182
2183                 /* load known replies. */
2184                 int replyCounter = 0;
2185                 while (true) {
2186                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2187                         if (knownReplyId == null) {
2188                                 break;
2189                         }
2190                         synchronized (knownReplies) {
2191                                 knownReplies.add(knownReplyId);
2192                         }
2193                 }
2194
2195                 /* load bookmarked posts. */
2196                 int bookmarkedPostCounter = 0;
2197                 while (true) {
2198                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2199                         if (bookmarkedPostId == null) {
2200                                 break;
2201                         }
2202                         synchronized (bookmarkedPosts) {
2203                                 bookmarkedPosts.add(bookmarkedPostId);
2204                         }
2205                 }
2206
2207         }
2208
2209         /**
2210          * Loads an {@link Integer} configuration value for the option with the
2211          * given name, logging validation failures.
2212          *
2213          * @param optionName
2214          *            The name of the option to load
2215          */
2216         private void loadConfigurationValue(String optionName) {
2217                 try {
2218                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2219                 } catch (IllegalArgumentException iae1) {
2220                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2221                 }
2222         }
2223
2224         /**
2225          * Notifies the core that a new {@link OwnIdentity} was added.
2226          *
2227          * @param ownIdentityAddedEvent
2228          *            The event
2229          */
2230         @Subscribe
2231         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2232                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2233                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2234                 if (ownIdentity.hasContext("Sone")) {
2235                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2236                         addLocalSone(ownIdentity);
2237                 }
2238         }
2239
2240         /**
2241          * Notifies the core that an {@link OwnIdentity} was removed.
2242          *
2243          * @param ownIdentityRemovedEvent
2244          *            The event
2245          */
2246         @Subscribe
2247         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2248                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2249                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2250                 trustedIdentities.remove(ownIdentity);
2251         }
2252
2253         /**
2254          * Notifies the core that a new {@link Identity} was added.
2255          *
2256          * @param identityAddedEvent
2257          *            The event
2258          */
2259         @Subscribe
2260         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2261                 Identity identity = identityAddedEvent.identity();
2262                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2263                 trustedIdentities.get(identityAddedEvent.ownIdentity()).add(identity);
2264                 addRemoteSone(identity);
2265         }
2266
2267         /**
2268          * Notifies the core that an {@link Identity} was updated.
2269          *
2270          * @param identityUpdatedEvent
2271          *            The event
2272          */
2273         @Subscribe
2274         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2275                 final Identity identity = identityUpdatedEvent.identity();
2276                 soneDownloaders.execute(new Runnable() {
2277
2278                         @Override
2279                         @SuppressWarnings("synthetic-access")
2280                         public void run() {
2281                                 Sone sone = getRemoteSone(identity.getId(), false);
2282                                 sone.setIdentity(identity);
2283                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2284                                 soneDownloader.addSone(sone);
2285                                 soneDownloader.fetchSone(sone);
2286                         }
2287                 });
2288         }
2289
2290         /**
2291          * Notifies the core that an {@link Identity} was removed.
2292          *
2293          * @param identityRemovedEvent
2294          *            The event
2295          */
2296         @Subscribe
2297         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2298                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2299                 Identity identity = identityRemovedEvent.identity();
2300                 trustedIdentities.get(ownIdentity).remove(identity);
2301                 boolean foundIdentity = false;
2302                 for (Entry<OwnIdentity, Set<Identity>> trustedIdentity : trustedIdentities.entrySet()) {
2303                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2304                                 continue;
2305                         }
2306                         if (trustedIdentity.getValue().contains(identity)) {
2307                                 foundIdentity = true;
2308                         }
2309                 }
2310                 if (foundIdentity) {
2311                         /* some local identity still trusts this identity, don’t remove. */
2312                         return;
2313                 }
2314                 Sone sone = getSone(identity.getId());
2315                 if (sone == null) {
2316                         /* TODO - we don’t have the Sone anymore. should this happen? */
2317                         return;
2318                 }
2319                 synchronized (posts) {
2320                         synchronized (knownPosts) {
2321                                 for (Post post : sone.getPosts()) {
2322                                         posts.remove(post.getId());
2323                                         eventBus.post(new PostRemovedEvent(post));
2324                                 }
2325                         }
2326                 }
2327                 synchronized (replies) {
2328                         synchronized (knownReplies) {
2329                                 for (PostReply reply : sone.getReplies()) {
2330                                         replies.remove(reply.getId());
2331                                         eventBus.post(new PostReplyRemovedEvent(reply));
2332                                 }
2333                         }
2334                 }
2335                 synchronized (sones) {
2336                         sones.remove(identity.getId());
2337                 }
2338                 eventBus.post(new SoneRemovedEvent(sone));
2339         }
2340
2341         /**
2342          * Deletes the temporary image.
2343          *
2344          * @param imageInsertFinishedEvent
2345          *            The event
2346          */
2347         @Subscribe
2348         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2349                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2350                 imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
2351                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2352                 touchConfiguration();
2353         }
2354
2355 }