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.PostBuilder;
  60 import net.pterodactylus.sone.data.PostBuilderFactory;
  61 import net.pterodactylus.sone.data.PostReply;
  62 import net.pterodactylus.sone.data.PostReplyBuilder;
  63 import net.pterodactylus.sone.data.PostReplyBuilderFactory;
  64 import net.pterodactylus.sone.data.Profile;
  65 import net.pterodactylus.sone.data.Profile.Field;
  66 import net.pterodactylus.sone.data.Reply;
  67 import net.pterodactylus.sone.data.Sone;
  68 import net.pterodactylus.sone.data.Sone.ShowCustomAvatars;
  69 import net.pterodactylus.sone.data.Sone.SoneStatus;
  70 import net.pterodactylus.sone.data.TemporaryImage;
  71 import net.pterodactylus.sone.fcp.FcpInterface;
  72 import net.pterodactylus.sone.fcp.FcpInterface.FullAccessRequired;
  73 import net.pterodactylus.sone.freenet.wot.Identity;
  74 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  75 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  76 import net.pterodactylus.sone.freenet.wot.event.IdentityAddedEvent;
  77 import net.pterodactylus.sone.freenet.wot.event.IdentityRemovedEvent;
  78 import net.pterodactylus.sone.freenet.wot.event.IdentityUpdatedEvent;
  79 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityAddedEvent;
  80 import net.pterodactylus.sone.freenet.wot.event.OwnIdentityRemovedEvent;
  81 import net.pterodactylus.sone.main.SonePlugin;
  82 import net.pterodactylus.sone.utils.IntegerRangePredicate;
  83 import net.pterodactylus.util.config.Configuration;
  84 import net.pterodactylus.util.config.ConfigurationException;
  85 import net.pterodactylus.util.logging.Logging;
  86 import net.pterodactylus.util.number.Numbers;
  87 import net.pterodactylus.util.service.AbstractService;
  88 import net.pterodactylus.util.thread.NamedThreadFactory;
  89
  90 import com.google.common.base.Function;
  91 import com.google.common.base.Optional;
  92 import com.google.common.base.Predicate;
  93 import com.google.common.base.Predicates;
  94 import com.google.common.collect.Collections2;
  95 import com.google.common.collect.FluentIterable;
  96 import com.google.common.collect.Ordering;
  97 import com.google.common.eventbus.EventBus;
  98 import com.google.common.eventbus.Subscribe;
  99 import com.google.inject.Inject;
 100
 101 import freenet.keys.FreenetURI;
 102
 103 /**
 104  * The Sone core.
 105  *
 106  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
 107  */
 108 public class Core extends AbstractService implements SoneProvider, PostProvider, PostReplyProvider {
 109
 110         /** The logger. */
 111         private static final Logger logger = Logging.getLogger(Core.class);
 112
 113         /** The start time. */
 114         private final long startupTime = System.currentTimeMillis();
 115
 116         /** The options. */
 117         private final Options options = new Options();
 118
 119         /** The preferences. */
 120         private final Preferences preferences = new Preferences(options);
 121
 122         /** The event bus. */
 123         private final EventBus eventBus;
 124
 125         /** The configuration. */
 126         private Configuration configuration;
 127
 128         /** Whether we’re currently saving the configuration. */
 129         private boolean storingConfiguration = false;
 130
 131         /** The identity manager. */
 132         private final IdentityManager identityManager;
 133
 134         /** Interface to freenet. */
 135         private final FreenetInterface freenetInterface;
 136
 137         /** The Sone downloader. */
 138         private final SoneDownloader soneDownloader;
 139
 140         /** The image inserter. */
 141         private final ImageInserter imageInserter;
 142
 143         /** Sone downloader thread-pool. */
 144         private final ExecutorService soneDownloaders = Executors.newFixedThreadPool(10, new NamedThreadFactory("Sone Downloader %2$d"));
 145
 146         /** The update checker. */
 147         private final UpdateChecker updateChecker;
 148
 149         /** The trust updater. */
 150         private final WebOfTrustUpdater webOfTrustUpdater;
 151
 152         /** The FCP interface. */
 153         private volatile FcpInterface fcpInterface;
 154
 155         /** The times Sones were followed. */
 156         private final Map<Sone, Long> soneFollowingTimes = new HashMap<Sone, Long>();
 157
 158         /** Locked local Sones. */
 159         /* synchronize on itself. */
 160         private final Set<Sone> lockedSones = new HashSet<Sone>();
 161
 162         /** Sone inserters. */
 163         /* synchronize access on this on sones. */
 164         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 165
 166         /** Sone rescuers. */
 167         /* synchronize access on this on sones. */
 168         private final Map<Sone, SoneRescuer> soneRescuers = new HashMap<Sone, SoneRescuer>();
 169
 170         /** All Sones. */
 171         /* synchronize access on this on itself. */
 172         private final Map<String, Sone> sones = new HashMap<String, Sone>();
 173
 174         /** All known Sones. */
 175         private final Set<String> knownSones = new HashSet<String>();
 176
 177         /** The post builder. */
 178         private final PostBuilderFactory postBuilderFactory;
 179
 180         /** All posts. */
 181         private final Map<String, Post> posts = new HashMap<String, Post>();
 182
 183         /** All known posts. */
 184         private final Set<String> knownPosts = new HashSet<String>();
 185
 186         /** The post reply builder factory. */
 187         private final PostReplyBuilderFactory postReplyBuilderFactory;
 188
 189         /** All replies. */
 190         private final Map<String, PostReply> replies = new HashMap<String, PostReply>();
 191
 192         /** All known replies. */
 193         private final Set<String> knownReplies = new HashSet<String>();
 194
 195         /** All bookmarked posts. */
 196         /* synchronize access on itself. */
 197         private final Set<String> bookmarkedPosts = new HashSet<String>();
 198
 199         /** Trusted identities, sorted by own identities. */
 200         private final Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 201
 202         /** All known albums. */
 203         private final Map<String, Album> albums = new HashMap<String, Album>();
 204
 205         /** All known images. */
 206         private final Map<String, Image> images = new HashMap<String, Image>();
 207
 208         /** All temporary images. */
 209         private final Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 210
 211         /** Ticker for threads that mark own elements as known. */
 212         private final ScheduledExecutorService localElementTicker = Executors.newScheduledThreadPool(1);
 213
 214         /** The time the configuration was last touched. */
 215         private volatile long lastConfigurationUpdate;
 216
 217         /**
 218          * Creates a new core.
 219          *
 220          * @param configuration
 221          *            The configuration of the core
 222          * @param freenetInterface
 223          *            The freenet interface
 224          * @param identityManager
 225          *            The identity manager
 226          * @param webOfTrustUpdater
 227          *            The WebOfTrust updater
 228          * @param eventBus
 229          *            The event bus
 230          * @param postBuilderFactory
 231          *            The post builder
 232          * @param postReplyBuilderFactory
 233          *            The post reply builder factory
 234          */
 235         @Inject
 236         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager, WebOfTrustUpdater webOfTrustUpdater, EventBus eventBus, PostBuilderFactory postBuilderFactory, PostReplyBuilderFactory postReplyBuilderFactory) {
 237                 super("Sone Core");
 238                 this.configuration = configuration;
 239                 this.freenetInterface = freenetInterface;
 240                 this.identityManager = identityManager;
 241                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 242                 this.imageInserter = new ImageInserter(freenetInterface);
 243                 this.updateChecker = new UpdateChecker(eventBus, freenetInterface);
 244                 this.webOfTrustUpdater = webOfTrustUpdater;
 245                 this.eventBus = eventBus;
 246                 this.postBuilderFactory = postBuilderFactory;
 247                 this.postReplyBuilderFactory = postReplyBuilderFactory;
 248         }
 249
 250         //
 251         // ACCESSORS
 252         //
 253
 254         /**
 255          * Returns the time Sone was started.
 256          *
 257          * @return The startup time (in milliseconds since Jan 1, 1970 UTC)
 258          */
 259         public long getStartupTime() {
 260                 return startupTime;
 261         }
 262
 263         /**
 264          * Sets the configuration to use. This will automatically save the current
 265          * configuration to the given configuration.
 266          *
 267          * @param configuration
 268          *            The new configuration to use
 269          */
 270         public void setConfiguration(Configuration configuration) {
 271                 this.configuration = configuration;
 272                 touchConfiguration();
 273         }
 274
 275         /**
 276          * Returns the options used by the core.
 277          *
 278          * @return The options of the core
 279          */
 280         public Preferences getPreferences() {
 281                 return preferences;
 282         }
 283
 284         /**
 285          * Returns the identity manager used by the core.
 286          *
 287          * @return The identity manager
 288          */
 289         public IdentityManager getIdentityManager() {
 290                 return identityManager;
 291         }
 292
 293         /**
 294          * Returns the update checker.
 295          *
 296          * @return The update checker
 297          */
 298         public UpdateChecker getUpdateChecker() {
 299                 return updateChecker;
 300         }
 301
 302         /**
 303          * Sets the FCP interface to use.
 304          *
 305          * @param fcpInterface
 306          *            The FCP interface to use
 307          */
 308         public void setFcpInterface(FcpInterface fcpInterface) {
 309                 this.fcpInterface = fcpInterface;
 310         }
 311
 312         /**
 313          * Returns the Sone rescuer for the given local Sone.
 314          *
 315          * @param sone
 316          *            The local Sone to get the rescuer for
 317          * @return The Sone rescuer for the given Sone
 318          */
 319         public SoneRescuer getSoneRescuer(Sone sone) {
 320                 checkNotNull(sone, "sone must not be null");
 321                 checkArgument(sone.isLocal(), "sone must be local");
 322                 synchronized (sones) {
 323                         SoneRescuer soneRescuer = soneRescuers.get(sone);
 324                         if (soneRescuer == null) {
 325                                 soneRescuer = new SoneRescuer(this, soneDownloader, sone);
 326                                 soneRescuers.put(sone, soneRescuer);
 327                                 soneRescuer.start();
 328                         }
 329                         return soneRescuer;
 330                 }
 331         }
 332
 333         /**
 334          * Returns whether the given Sone is currently locked.
 335          *
 336          * @param sone
 337          *            The sone to check
 338          * @return {@code true} if the Sone is locked, {@code false} if it is not
 339          */
 340         public boolean isLocked(Sone sone) {
 341                 synchronized (lockedSones) {
 342                         return lockedSones.contains(sone);
 343                 }
 344         }
 345
 346         /**
 347          * Returns all Sones, remote and local.
 348          *
 349          * @return All Sones
 350          */
 351         public Set<Sone> getSones() {
 352                 return new HashSet<Sone>(sones.values());
 353         }
 354
 355         /**
 356          * Returns the Sone with the given ID, regardless whether it’s local or
 357          * remote.
 358          *
 359          * @param id
 360          *            The ID of the Sone to get
 361          * @return The Sone with the given ID, or {@code null} if there is no such
 362          *         Sone
 363          */
 364         public Sone getSone(String id) {
 365                 return getSone(id, true);
 366         }
 367
 368         /**
 369          * Returns the Sone with the given ID, regardless whether it’s local or
 370          * remote.
 371          *
 372          * @param id
 373          *            The ID of the Sone to get
 374          * @param create
 375          *            {@code true} to create a new Sone if none exists,
 376          *            {@code false} to return {@code null} if a Sone with the given
 377          *            ID does not exist
 378          * @return The Sone with the given ID, or {@code null} if there is no such
 379          *         Sone
 380          */
 381         @Override
 382         public Sone getSone(String id, boolean create) {
 383                 synchronized (sones) {
 384                         if (!sones.containsKey(id) && create) {
 385                                 Sone sone = new Sone(id, false);
 386                                 sones.put(id, sone);
 387                         }
 388                         return sones.get(id);
 389                 }
 390         }
 391
 392         /**
 393          * Checks whether the core knows a Sone with the given ID.
 394          *
 395          * @param id
 396          *            The ID of the Sone
 397          * @return {@code true} if there is a Sone with the given ID, {@code false}
 398          *         otherwise
 399          */
 400         public boolean hasSone(String id) {
 401                 synchronized (sones) {
 402                         return sones.containsKey(id);
 403                 }
 404         }
 405
 406         /**
 407          * Returns all local Sones.
 408          *
 409          * @return All local Sones
 410          */
 411         public Collection<Sone> getLocalSones() {
 412                 synchronized (sones) {
 413                         return Collections2.filter(sones.values(), new Predicate<Sone>() {
 414
 415                                 @Override
 416                                 public boolean apply(Sone sone) {
 417                                         return sone.isLocal();
 418                                 }
 419                         });
 420                 }
 421         }
 422
 423         /**
 424          * Returns the local Sone with the given ID, optionally creating a new Sone.
 425          *
 426          * @param id
 427          *            The ID of the Sone
 428          * @param create
 429          *            {@code true} to create a new Sone if none exists,
 430          *            {@code false} to return null if none exists
 431          * @return The Sone with the given ID, or {@code null}
 432          */
 433         public Sone getLocalSone(String id, boolean create) {
 434                 synchronized (sones) {
 435                         Sone sone = sones.get(id);
 436                         if ((sone == null) && create) {
 437                                 sone = new Sone(id, true);
 438                                 sones.put(id, sone);
 439                         }
 440                         if ((sone != null) && !sone.isLocal()) {
 441                                 sone = new Sone(id, true);
 442                                 sones.put(id, sone);
 443                         }
 444                         return sone;
 445                 }
 446         }
 447
 448         /**
 449          * Returns all remote Sones.
 450          *
 451          * @return All remote Sones
 452          */
 453         public Collection<Sone> getRemoteSones() {
 454                 synchronized (sones) {
 455                         return Collections2.filter(sones.values(), new Predicate<Sone>() {
 456
 457                                 @Override
 458                                 public boolean apply(Sone sone) {
 459                                         return !sone.isLocal();
 460                                 }
 461                         });
 462                 }
 463         }
 464
 465         /**
 466          * Returns the remote Sone with the given ID.
 467          *
 468          * @param id
 469          *            The ID of the remote Sone to get
 470          * @param create
 471          *            {@code true} to always create a Sone, {@code false} to return
 472          *            {@code null} if no Sone with the given ID exists
 473          * @return The Sone with the given ID
 474          */
 475         public Sone getRemoteSone(String id, boolean create) {
 476                 synchronized (sones) {
 477                         Sone sone = sones.get(id);
 478                         if ((sone == null) && create && (id != null) && (id.length() == 43)) {
 479                                 sone = new Sone(id, false);
 480                                 sones.put(id, sone);
 481                         }
 482                         return sone;
 483                 }
 484         }
 485
 486         /**
 487          * Returns whether the given Sone has been modified.
 488          *
 489          * @param sone
 490          *            The Sone to check for modifications
 491          * @return {@code true} if a modification has been detected in the Sone,
 492          *         {@code false} otherwise
 493          */
 494         public boolean isModifiedSone(Sone sone) {
 495                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 496         }
 497
 498         /**
 499          * Returns the time when the given was first followed by any local Sone.
 500          *
 501          * @param sone
 502          *            The Sone to get the time for
 503          * @return The time (in milliseconds since Jan 1, 1970) the Sone has first
 504          *         been followed, or {@link Long#MAX_VALUE}
 505          */
 506         public long getSoneFollowingTime(Sone sone) {
 507                 synchronized (soneFollowingTimes) {
 508                         if (soneFollowingTimes.containsKey(sone)) {
 509                                 return soneFollowingTimes.get(sone);
 510                         }
 511                         return Long.MAX_VALUE;
 512                 }
 513         }
 514
 515         /**
 516          * Returns whether the target Sone is trusted by the origin Sone.
 517          *
 518          * @param origin
 519          *            The origin Sone
 520          * @param target
 521          *            The target Sone
 522          * @return {@code true} if the target Sone is trusted by the origin Sone
 523          */
 524         public boolean isSoneTrusted(Sone origin, Sone target) {
 525                 checkNotNull(origin, "origin must not be null");
 526                 checkNotNull(target, "target must not be null");
 527                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin’s identity must be an OwnIdentity");
 528                 return trustedIdentities.containsKey(origin.getIdentity()) && trustedIdentities.get(origin.getIdentity()).contains(target.getIdentity());
 529         }
 530
 531         /**
 532          * Returns a post builder.
 533          *
 534          * @return A new post builder
 535          */
 536         public PostBuilder postBuilder() {
 537                 return postBuilderFactory.newPostBuilder();
 538         }
 539
 540         /**
 541          * {@inheritDoc}
 542          */
 543         @Override
 544         public Optional<Post> getPost(String postId) {
 545                 synchronized (posts) {
 546                         return Optional.fromNullable(posts.get(postId));
 547                 }
 548         }
 549
 550         /**
 551          * Returns all posts that have the given Sone as recipient.
 552          *
 553          * @see Post#getRecipient()
 554          * @param recipient
 555          *            The recipient of the posts
 556          * @return All posts that have the given Sone as recipient
 557          */
 558         public Set<Post> getDirectedPosts(Sone recipient) {
 559                 checkNotNull(recipient, "recipient must not be null");
 560                 Set<Post> directedPosts = new HashSet<Post>();
 561                 synchronized (posts) {
 562                         for (Post post : posts.values()) {
 563                                 if (recipient.equals(post.getRecipient())) {
 564                                         directedPosts.add(post);
 565                                 }
 566                         }
 567                 }
 568                 return directedPosts;
 569         }
 570
 571         /**
 572          * Returns a post reply builder.
 573          *
 574          * @return A new post reply builder
 575          */
 576         public PostReplyBuilder postReplyBuilder() {
 577                 return postReplyBuilderFactory.newPostReplyBuilder();
 578         }
 579
 580         /**
 581          * {@inheritDoc}
 582          */
 583         @Override
 584         public Optional<PostReply> getPostReply(String replyId) {
 585                 synchronized (replies) {
 586                         return Optional.fromNullable(replies.get(replyId));
 587                 }
 588         }
 589
 590         /**
 591          * {@inheritDoc}
 592          */
 593         @Override
 594         public List<PostReply> getReplies(final Post post) {
 595                 return Ordering.from(Reply.TIME_COMPARATOR).sortedCopy(FluentIterable.from(getSones()).transformAndConcat(new Function<Sone, Iterable<PostReply>>() {
 596
 597                         @Override
 598                         public Iterable<PostReply> apply(Sone sone) {
 599                                 return sone.getReplies();
 600                         }
 601                 }).filter(new Predicate<PostReply>() {
 602
 603                         @Override
 604                         public boolean apply(PostReply reply) {
 605                                 return post.getId().equals(reply.getPostId());
 606                         }
 607                 }));
 608         }
 609
 610         /**
 611          * Returns all Sones that have liked the given post.
 612          *
 613          * @param post
 614          *            The post to get the liking Sones for
 615          * @return The Sones that like the given post
 616          */
 617         public Set<Sone> getLikes(Post post) {
 618                 Set<Sone> sones = new HashSet<Sone>();
 619                 for (Sone sone : getSones()) {
 620                         if (sone.getLikedPostIds().contains(post.getId())) {
 621                                 sones.add(sone);
 622                         }
 623                 }
 624                 return sones;
 625         }
 626
 627         /**
 628          * Returns all Sones that have liked the given reply.
 629          *
 630          * @param reply
 631          *            The reply to get the liking Sones for
 632          * @return The Sones that like the given reply
 633          */
 634         public Set<Sone> getLikes(PostReply reply) {
 635                 Set<Sone> sones = new HashSet<Sone>();
 636                 for (Sone sone : getSones()) {
 637                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 638                                 sones.add(sone);
 639                         }
 640                 }
 641                 return sones;
 642         }
 643
 644         /**
 645          * Returns whether the given post is bookmarked.
 646          *
 647          * @param post
 648          *            The post to check
 649          * @return {@code true} if the given post is bookmarked, {@code false}
 650          *         otherwise
 651          */
 652         public boolean isBookmarked(Post post) {
 653                 return isPostBookmarked(post.getId());
 654         }
 655
 656         /**
 657          * Returns whether the post with the given ID is bookmarked.
 658          *
 659          * @param id
 660          *            The ID of the post to check
 661          * @return {@code true} if the post with the given ID is bookmarked,
 662          *         {@code false} otherwise
 663          */
 664         public boolean isPostBookmarked(String id) {
 665                 synchronized (bookmarkedPosts) {
 666                         return bookmarkedPosts.contains(id);
 667                 }
 668         }
 669
 670         /**
 671          * Returns all currently known bookmarked posts.
 672          *
 673          * @return All bookmarked posts
 674          */
 675         public Set<Post> getBookmarkedPosts() {
 676                 Set<Post> posts = new HashSet<Post>();
 677                 synchronized (bookmarkedPosts) {
 678                         for (String bookmarkedPostId : bookmarkedPosts) {
 679                                 Optional<Post> post = getPost(bookmarkedPostId);
 680                                 if (!post.isPresent()) {
 681                                         posts.add(post.get());
 682                                 }
 683                         }
 684                 }
 685                 return posts;
 686         }
 687
 688         /**
 689          * Returns the album with the given ID, creating a new album if no album
 690          * with the given ID can be found.
 691          *
 692          * @param albumId
 693          *            The ID of the album
 694          * @return The album with the given ID
 695          */
 696         public Album getAlbum(String albumId) {
 697                 return getAlbum(albumId, true);
 698         }
 699
 700         /**
 701          * Returns the album with the given ID, optionally creating a new album if
 702          * an album with the given ID can not be found.
 703          *
 704          * @param albumId
 705          *            The ID of the album
 706          * @param create
 707          *            {@code true} to create a new album if none exists for the
 708          *            given ID
 709          * @return The album with the given ID, or {@code null} if no album with the
 710          *         given ID exists and {@code create} is {@code false}
 711          */
 712         public Album getAlbum(String albumId, boolean create) {
 713                 synchronized (albums) {
 714                         Album album = albums.get(albumId);
 715                         if (create && (album == null)) {
 716                                 album = new Album(albumId);
 717                                 albums.put(albumId, album);
 718                         }
 719                         return album;
 720                 }
 721         }
 722
 723         /**
 724          * Returns the image with the given ID, creating it if necessary.
 725          *
 726          * @param imageId
 727          *            The ID of the image
 728          * @return The image with the given ID
 729          */
 730         public Image getImage(String imageId) {
 731                 return getImage(imageId, true);
 732         }
 733
 734         /**
 735          * Returns the image with the given ID, optionally creating it if it does
 736          * not exist.
 737          *
 738          * @param imageId
 739          *            The ID of the image
 740          * @param create
 741          *            {@code true} to create an image if none exists with the given
 742          *            ID
 743          * @return The image with the given ID, or {@code null} if none exists and
 744          *         none was created
 745          */
 746         public Image getImage(String imageId, boolean create) {
 747                 synchronized (images) {
 748                         Image image = images.get(imageId);
 749                         if (create && (image == null)) {
 750                                 image = new Image(imageId);
 751                                 images.put(imageId, image);
 752                         }
 753                         return image;
 754                 }
 755         }
 756
 757         /**
 758          * Returns the temporary image with the given ID.
 759          *
 760          * @param imageId
 761          *            The ID of the temporary image
 762          * @return The temporary image, or {@code null} if there is no temporary
 763          *         image with the given ID
 764          */
 765         public TemporaryImage getTemporaryImage(String imageId) {
 766                 synchronized (temporaryImages) {
 767                         return temporaryImages.get(imageId);
 768                 }
 769         }
 770
 771         //
 772         // ACTIONS
 773         //
 774
 775         /**
 776          * Locks the given Sone. A locked Sone will not be inserted by
 777          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 778          * again.
 779          *
 780          * @param sone
 781          *            The sone to lock
 782          */
 783         public void lockSone(Sone sone) {
 784                 synchronized (lockedSones) {
 785                         if (lockedSones.add(sone)) {
 786                                 eventBus.post(new SoneLockedEvent(sone));
 787                         }
 788                 }
 789         }
 790
 791         /**
 792          * Unlocks the given Sone.
 793          *
 794          * @see #lockSone(Sone)
 795          * @param sone
 796          *            The sone to unlock
 797          */
 798         public void unlockSone(Sone sone) {
 799                 synchronized (lockedSones) {
 800                         if (lockedSones.remove(sone)) {
 801                                 eventBus.post(new SoneUnlockedEvent(sone));
 802                         }
 803                 }
 804         }
 805
 806         /**
 807          * Adds a local Sone from the given own identity.
 808          *
 809          * @param ownIdentity
 810          *            The own identity to create a Sone from
 811          * @return The added (or already existing) Sone
 812          */
 813         public Sone addLocalSone(OwnIdentity ownIdentity) {
 814                 if (ownIdentity == null) {
 815                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 816                         return null;
 817                 }
 818                 synchronized (sones) {
 819                         final Sone sone;
 820                         try {
 821                                 sone = getLocalSone(ownIdentity.getId(), true).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 822                         } catch (MalformedURLException mue1) {
 823                                 logger.log(Level.SEVERE, String.format("Could not convert the Identity’s URIs to Freenet URIs: %s, %s", ownIdentity.getInsertUri(), ownIdentity.getRequestUri()), mue1);
 824                                 return null;
 825                         }
 826                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 827                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 828                         sone.setKnown(true);
 829                         /* TODO - load posts ’n stuff */
 830                         sones.put(ownIdentity.getId(), sone);
 831                         final SoneInserter soneInserter = new SoneInserter(this, eventBus, freenetInterface, sone);
 832                         soneInserters.put(sone, soneInserter);
 833                         sone.setStatus(SoneStatus.idle);
 834                         loadSone(sone);
 835                         soneInserter.start();
 836                         return sone;
 837                 }
 838         }
 839
 840         /**
 841          * Creates a new Sone for the given own identity.
 842          *
 843          * @param ownIdentity
 844          *            The own identity to create a Sone for
 845          * @return The created Sone
 846          */
 847         public Sone createSone(OwnIdentity ownIdentity) {
 848                 if (!webOfTrustUpdater.addContextWait(ownIdentity, "Sone")) {
 849                         logger.log(Level.SEVERE, String.format("Could not add “Sone” context to own identity: %s", ownIdentity));
 850                         return null;
 851                 }
 852                 Sone sone = addLocalSone(ownIdentity);
 853                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 854                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
 855                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
 856                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
 857                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
 858                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
 859
 860                 followSone(sone, getSone("nwa8lHa271k2QvJ8aa0Ov7IHAV-DFOCFgmDt3X6BpCI"));
 861                 touchConfiguration();
 862                 return sone;
 863         }
 864
 865         /**
 866          * Adds the Sone of the given identity.
 867          *
 868          * @param identity
 869          *            The identity whose Sone to add
 870          * @return The added or already existing Sone
 871          */
 872         public Sone addRemoteSone(Identity identity) {
 873                 if (identity == null) {
 874                         logger.log(Level.WARNING, "Given Identity is null!");
 875                         return null;
 876                 }
 877                 synchronized (sones) {
 878                         final Sone sone = getRemoteSone(identity.getId(), true).setIdentity(identity);
 879                         boolean newSone = sone.getRequestUri() == null;
 880                         sone.setRequestUri(SoneUri.create(identity.getRequestUri()));
 881                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 882                         if (newSone) {
 883                                 synchronized (knownSones) {
 884                                         newSone = !knownSones.contains(sone.getId());
 885                                 }
 886                                 sone.setKnown(!newSone);
 887                                 if (newSone) {
 888                                         eventBus.post(new NewSoneFoundEvent(sone));
 889                                         for (Sone localSone : getLocalSones()) {
 890                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
 891                                                         followSone(localSone, sone);
 892                                                 }
 893                                         }
 894                                 }
 895                         }
 896                         soneDownloader.addSone(sone);
 897                         soneDownloaders.execute(new Runnable() {
 898
 899                                 @Override
 900                                 @SuppressWarnings("synthetic-access")
 901                                 public void run() {
 902                                         soneDownloader.fetchSone(sone, sone.getRequestUri());
 903                                 }
 904
 905                         });
 906                         return sone;
 907                 }
 908         }
 909
 910         /**
 911          * Lets the given local Sone follow the Sone with the given ID.
 912          *
 913          * @param sone
 914          *            The local Sone that should follow another Sone
 915          * @param soneId
 916          *            The ID of the Sone to follow
 917          */
 918         public void followSone(Sone sone, String soneId) {
 919                 checkNotNull(sone, "sone must not be null");
 920                 checkNotNull(soneId, "soneId must not be null");
 921                 Sone followedSone = getSone(soneId, true);
 922                 if (followedSone == null) {
 923                         logger.log(Level.INFO, String.format("Ignored Sone with invalid ID: %s", soneId));
 924                         return;
 925                 }
 926                 followSone(sone, getSone(soneId));
 927         }
 928
 929         /**
 930          * Lets the given local Sone follow the other given Sone. If the given Sone
 931          * was not followed by any local Sone before, this will mark all elements of
 932          * the followed Sone as read that have been created before the current
 933          * moment.
 934          *
 935          * @param sone
 936          *            The local Sone that should follow the other Sone
 937          * @param followedSone
 938          *            The Sone that should be followed
 939          */
 940         public void followSone(Sone sone, Sone followedSone) {
 941                 checkNotNull(sone, "sone must not be null");
 942                 checkNotNull(followedSone, "followedSone must not be null");
 943                 sone.addFriend(followedSone.getId());
 944                 synchronized (soneFollowingTimes) {
 945                         if (!soneFollowingTimes.containsKey(followedSone)) {
 946                                 long now = System.currentTimeMillis();
 947                                 soneFollowingTimes.put(followedSone, now);
 948                                 for (Post post : followedSone.getPosts()) {
 949                                         if (post.getTime() < now) {
 950                                                 markPostKnown(post);
 951                                         }
 952                                 }
 953                                 for (PostReply reply : followedSone.getReplies()) {
 954                                         if (reply.getTime() < now) {
 955                                                 markReplyKnown(reply);
 956                                         }
 957                                 }
 958                         }
 959                 }
 960                 touchConfiguration();
 961         }
 962
 963         /**
 964          * Lets the given local Sone unfollow the Sone with the given ID.
 965          *
 966          * @param sone
 967          *            The local Sone that should unfollow another Sone
 968          * @param soneId
 969          *            The ID of the Sone being unfollowed
 970          */
 971         public void unfollowSone(Sone sone, String soneId) {
 972                 checkNotNull(sone, "sone must not be null");
 973                 checkNotNull(soneId, "soneId must not be null");
 974                 unfollowSone(sone, getSone(soneId, false));
 975         }
 976
 977         /**
 978          * Lets the given local Sone unfollow the other given Sone. If the given
 979          * local Sone is the last local Sone that followed the given Sone, its
 980          * following time will be removed.
 981          *
 982          * @param sone
 983          *            The local Sone that should unfollow another Sone
 984          * @param unfollowedSone
 985          *            The Sone being unfollowed
 986          */
 987         public void unfollowSone(Sone sone, Sone unfollowedSone) {
 988                 checkNotNull(sone, "sone must not be null");
 989                 checkNotNull(unfollowedSone, "unfollowedSone must not be null");
 990                 sone.removeFriend(unfollowedSone.getId());
 991                 boolean unfollowedSoneStillFollowed = false;
 992                 for (Sone localSone : getLocalSones()) {
 993                         unfollowedSoneStillFollowed |= localSone.hasFriend(unfollowedSone.getId());
 994                 }
 995                 if (!unfollowedSoneStillFollowed) {
 996                         synchronized (soneFollowingTimes) {
 997                                 soneFollowingTimes.remove(unfollowedSone);
 998                         }
 999                 }
1000                 touchConfiguration();
1001         }
1002
1003         /**
1004          * Sets the trust value of the given origin Sone for the target Sone.
1005          *
1006          * @param origin
1007          *            The origin Sone
1008          * @param target
1009          *            The target Sone
1010          * @param trustValue
1011          *            The trust value (from {@code -100} to {@code 100})
1012          */
1013         public void setTrust(Sone origin, Sone target, int trustValue) {
1014                 checkNotNull(origin, "origin must not be null");
1015                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
1016                 checkNotNull(target, "target must not be null");
1017                 checkArgument((trustValue >= -100) && (trustValue <= 100), "trustValue must be within [-100, 100]");
1018                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), trustValue, preferences.getTrustComment());
1019         }
1020
1021         /**
1022          * Removes any trust assignment for the given target Sone.
1023          *
1024          * @param origin
1025          *            The trust origin
1026          * @param target
1027          *            The trust target
1028          */
1029         public void removeTrust(Sone origin, Sone target) {
1030                 checkNotNull(origin, "origin must not be null");
1031                 checkNotNull(target, "target must not be null");
1032                 checkArgument(origin.getIdentity() instanceof OwnIdentity, "origin must be a local Sone");
1033                 webOfTrustUpdater.setTrust((OwnIdentity) origin.getIdentity(), target.getIdentity(), null, null);
1034         }
1035
1036         /**
1037          * Assigns the configured positive trust value for the given target.
1038          *
1039          * @param origin
1040          *            The trust origin
1041          * @param target
1042          *            The trust target
1043          */
1044         public void trustSone(Sone origin, Sone target) {
1045                 setTrust(origin, target, preferences.getPositiveTrust());
1046         }
1047
1048         /**
1049          * Assigns the configured negative trust value for the given target.
1050          *
1051          * @param origin
1052          *            The trust origin
1053          * @param target
1054          *            The trust target
1055          */
1056         public void distrustSone(Sone origin, Sone target) {
1057                 setTrust(origin, target, preferences.getNegativeTrust());
1058         }
1059
1060         /**
1061          * Removes the trust assignment for the given target.
1062          *
1063          * @param origin
1064          *            The trust origin
1065          * @param target
1066          *            The trust target
1067          */
1068         public void untrustSone(Sone origin, Sone target) {
1069                 removeTrust(origin, target);
1070         }
1071
1072         /**
1073          * Updates the stored Sone with the given Sone.
1074          *
1075          * @param sone
1076          *            The updated Sone
1077          */
1078         public void updateSone(Sone sone) {
1079                 updateSone(sone, false);
1080         }
1081
1082         /**
1083          * Updates the stored Sone with the given Sone. If {@code soneRescueMode} is
1084          * {@code true}, an older Sone than the current Sone can be given to restore
1085          * an old state.
1086          *
1087          * @param sone
1088          *            The Sone to update
1089          * @param soneRescueMode
1090          *            {@code true} if the stored Sone should be updated regardless
1091          *            of the age of the given Sone
1092          */
1093         public void updateSone(Sone sone, boolean soneRescueMode) {
1094                 if (hasSone(sone.getId())) {
1095                         Sone storedSone = getSone(sone.getId());
1096                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
1097                                 logger.log(Level.FINE, String.format("Downloaded Sone %s is not newer than stored Sone %s.", sone, storedSone));
1098                                 return;
1099                         }
1100                         synchronized (posts) {
1101                                 if (!soneRescueMode) {
1102                                         for (Post post : storedSone.getPosts()) {
1103                                                 posts.remove(post.getId());
1104                                                 if (!sone.getPosts().contains(post)) {
1105                                                         eventBus.post(new PostRemovedEvent(post));
1106                                                 }
1107                                         }
1108                                 }
1109                                 List<Post> storedPosts = storedSone.getPosts();
1110                                 synchronized (knownPosts) {
1111                                         for (Post post : sone.getPosts()) {
1112                                                 post.setKnown(knownPosts.contains(post.getId()));
1113                                                 if (!storedPosts.contains(post)) {
1114                                                         if (post.getTime() < getSoneFollowingTime(sone)) {
1115                                                                 knownPosts.add(post.getId());
1116                                                                 post.setKnown(true);
1117                                                         } else if (!knownPosts.contains(post.getId())) {
1118                                                                 eventBus.post(new NewPostFoundEvent(post));
1119                                                         }
1120                                                 }
1121                                                 posts.put(post.getId(), post);
1122                                         }
1123                                 }
1124                         }
1125                         synchronized (replies) {
1126                                 if (!soneRescueMode) {
1127                                         for (PostReply reply : storedSone.getReplies()) {
1128                                                 replies.remove(reply.getId());
1129                                                 if (!sone.getReplies().contains(reply)) {
1130                                                         eventBus.post(new PostReplyRemovedEvent(reply));
1131                                                 }
1132                                         }
1133                                 }
1134                                 Set<PostReply> storedReplies = storedSone.getReplies();
1135                                 synchronized (knownReplies) {
1136                                         for (PostReply reply : sone.getReplies()) {
1137                                                 reply.setKnown(knownReplies.contains(reply.getId()));
1138                                                 if (!storedReplies.contains(reply)) {
1139                                                         if (reply.getTime() < getSoneFollowingTime(sone)) {
1140                                                                 knownReplies.add(reply.getId());
1141                                                                 reply.setKnown(true);
1142                                                         } else if (!knownReplies.contains(reply.getId())) {
1143                                                                 eventBus.post(new NewPostReplyFoundEvent(reply));
1144                                                         }
1145                                                 }
1146                                                 replies.put(reply.getId(), reply);
1147                                         }
1148                                 }
1149                         }
1150                         synchronized (albums) {
1151                                 synchronized (images) {
1152                                         for (Album album : storedSone.getAlbums()) {
1153                                                 albums.remove(album.getId());
1154                                                 for (Image image : album.getImages()) {
1155                                                         images.remove(image.getId());
1156                                                 }
1157                                         }
1158                                         for (Album album : sone.getAlbums()) {
1159                                                 albums.put(album.getId(), album);
1160                                                 for (Image image : album.getImages()) {
1161                                                         images.put(image.getId(), image);
1162                                                 }
1163                                         }
1164                                 }
1165                         }
1166                         synchronized (sones) {
1167                                 sones.put(sone.getId(), sone);
1168                         }
1169                 }
1170         }
1171
1172         /**
1173          * Deletes the given Sone. This will remove the Sone from the
1174          * {@link #getLocalSones() local Sones}, stop its {@link SoneInserter} and
1175          * remove the context from its identity.
1176          *
1177          * @param sone
1178          *            The Sone to delete
1179          */
1180         public void deleteSone(Sone sone) {
1181                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1182                         logger.log(Level.WARNING, String.format("Tried to delete Sone of non-own identity: %s", sone));
1183                         return;
1184                 }
1185                 synchronized (sones) {
1186                         if (!getLocalSones().contains(sone)) {
1187                                 logger.log(Level.WARNING, String.format("Tried to delete non-local Sone: %s", sone));
1188                                 return;
1189                         }
1190                         sones.remove(sone.getId());
1191                         SoneInserter soneInserter = soneInserters.remove(sone);
1192                         soneInserter.stop();
1193                 }
1194                 webOfTrustUpdater.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
1195                 webOfTrustUpdater.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
1196                 try {
1197                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1198                 } catch (ConfigurationException ce1) {
1199                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1200                 }
1201         }
1202
1203         /**
1204          * Marks the given Sone as known. If the Sone was not {@link Post#isKnown()
1205          * known} before, a {@link MarkSoneKnownEvent} is fired.
1206          *
1207          * @param sone
1208          *            The Sone to mark as known
1209          */
1210         public void markSoneKnown(Sone sone) {
1211                 if (!sone.isKnown()) {
1212                         sone.setKnown(true);
1213                         synchronized (knownSones) {
1214                                 knownSones.add(sone.getId());
1215                         }
1216                         eventBus.post(new MarkSoneKnownEvent(sone));
1217                         touchConfiguration();
1218                 }
1219         }
1220
1221         /**
1222          * Loads and updates the given Sone from the configuration. If any error is
1223          * encountered, loading is aborted and the given Sone is not changed.
1224          *
1225          * @param sone
1226          *            The Sone to load and update
1227          */
1228         public void loadSone(Sone sone) {
1229                 if (!sone.isLocal()) {
1230                         logger.log(Level.FINE, String.format("Tried to load non-local Sone: %s", sone));
1231                         return;
1232                 }
1233
1234                 /* initialize options. */
1235                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1236                 sone.getOptions().addBooleanOption("EnableSoneInsertNotifications", new DefaultOption<Boolean>(false));
1237                 sone.getOptions().addBooleanOption("ShowNotification/NewSones", new DefaultOption<Boolean>(true));
1238                 sone.getOptions().addBooleanOption("ShowNotification/NewPosts", new DefaultOption<Boolean>(true));
1239                 sone.getOptions().addBooleanOption("ShowNotification/NewReplies", new DefaultOption<Boolean>(true));
1240                 sone.getOptions().addEnumOption("ShowCustomAvatars", new DefaultOption<ShowCustomAvatars>(ShowCustomAvatars.NEVER));
1241
1242                 /* load Sone. */
1243                 String sonePrefix = "Sone/" + sone.getId();
1244                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1245                 if (soneTime == null) {
1246                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1247                         return;
1248                 }
1249                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1250
1251                 /* load profile. */
1252                 Profile profile = new Profile(sone);
1253                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1254                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1255                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1256                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1257                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1258                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1259
1260                 /* load profile fields. */
1261                 while (true) {
1262                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1263                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1264                         if (fieldName == null) {
1265                                 break;
1266                         }
1267                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1268                         profile.addField(fieldName).setValue(fieldValue);
1269                 }
1270
1271                 /* load posts. */
1272                 Set<Post> posts = new HashSet<Post>();
1273                 while (true) {
1274                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1275                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1276                         if (postId == null) {
1277                                 break;
1278                         }
1279                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1280                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1281                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1282                         if ((postTime == 0) || (postText == null)) {
1283                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1284                                 return;
1285                         }
1286                         PostBuilder postBuilder = postBuilder().withId(postId).from(sone.getId()).withTime(postTime).withText(postText);
1287                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1288                                 postBuilder.to(postRecipientId);
1289                         }
1290                         posts.add(postBuilder.build());
1291                 }
1292
1293                 /* load replies. */
1294                 Set<PostReply> replies = new HashSet<PostReply>();
1295                 while (true) {
1296                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1297                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1298                         if (replyId == null) {
1299                                 break;
1300                         }
1301                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1302                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1303                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1304                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1305                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1306                                 return;
1307                         }
1308                         PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1309                         postReplyBuilder.withId(replyId).from(sone.getId()).to(postId).withTime(replyTime).withText(replyText);
1310                         replies.add(postReplyBuilder.build());
1311                 }
1312
1313                 /* load post likes. */
1314                 Set<String> likedPostIds = new HashSet<String>();
1315                 while (true) {
1316                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1317                         if (likedPostId == null) {
1318                                 break;
1319                         }
1320                         likedPostIds.add(likedPostId);
1321                 }
1322
1323                 /* load reply likes. */
1324                 Set<String> likedReplyIds = new HashSet<String>();
1325                 while (true) {
1326                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1327                         if (likedReplyId == null) {
1328                                 break;
1329                         }
1330                         likedReplyIds.add(likedReplyId);
1331                 }
1332
1333                 /* load friends. */
1334                 Set<String> friends = new HashSet<String>();
1335                 while (true) {
1336                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1337                         if (friendId == null) {
1338                                 break;
1339                         }
1340                         friends.add(friendId);
1341                 }
1342
1343                 /* load albums. */
1344                 List<Album> topLevelAlbums = new ArrayList<Album>();
1345                 int albumCounter = 0;
1346                 while (true) {
1347                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1348                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1349                         if (albumId == null) {
1350                                 break;
1351                         }
1352                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1353                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1354                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1355                         String albumImageId = configuration.getStringValue(albumPrefix + "/AlbumImage").getValue(null);
1356                         if ((albumTitle == null) || (albumDescription == null)) {
1357                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1358                                 return;
1359                         }
1360                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription).setAlbumImage(albumImageId);
1361                         if (albumParentId != null) {
1362                                 Album parentAlbum = getAlbum(albumParentId, false);
1363                                 if (parentAlbum == null) {
1364                                         logger.log(Level.WARNING, String.format("Invalid parent album ID: %s", albumParentId));
1365                                         return;
1366                                 }
1367                                 parentAlbum.addAlbum(album);
1368                         } else {
1369                                 if (!topLevelAlbums.contains(album)) {
1370                                         topLevelAlbums.add(album);
1371                                 }
1372                         }
1373                 }
1374
1375                 /* load images. */
1376                 int imageCounter = 0;
1377                 while (true) {
1378                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1379                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1380                         if (imageId == null) {
1381                                 break;
1382                         }
1383                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1384                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1385                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1386                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1387                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1388                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1389                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1390                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1391                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1392                                 return;
1393                         }
1394                         Album album = getAlbum(albumId, false);
1395                         if (album == null) {
1396                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1397                                 return;
1398                         }
1399                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1400                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1401                         album.addImage(image);
1402                 }
1403
1404                 /* load avatar. */
1405                 String avatarId = configuration.getStringValue(sonePrefix + "/Profile/Avatar").getValue(null);
1406                 if (avatarId != null) {
1407                         profile.setAvatar(getImage(avatarId, false));
1408                 }
1409
1410                 /* load options. */
1411                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1412                 sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").set(configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").getValue(null));
1413                 sone.getOptions().getBooleanOption("ShowNotification/NewSones").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").getValue(null));
1414                 sone.getOptions().getBooleanOption("ShowNotification/NewPosts").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").getValue(null));
1415                 sone.getOptions().getBooleanOption("ShowNotification/NewReplies").set(configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").getValue(null));
1416                 sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").set(ShowCustomAvatars.valueOf(configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").getValue(ShowCustomAvatars.NEVER.name())));
1417
1418                 /* if we’re still here, Sone was loaded successfully. */
1419                 synchronized (sone) {
1420                         sone.setTime(soneTime);
1421                         sone.setProfile(profile);
1422                         sone.setPosts(posts);
1423                         sone.setReplies(replies);
1424                         sone.setLikePostIds(likedPostIds);
1425                         sone.setLikeReplyIds(likedReplyIds);
1426                         for (String friendId : friends) {
1427                                 followSone(sone, friendId);
1428                         }
1429                         sone.setAlbums(topLevelAlbums);
1430                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1431                 }
1432                 synchronized (knownSones) {
1433                         for (String friend : friends) {
1434                                 knownSones.add(friend);
1435                         }
1436                 }
1437                 synchronized (knownPosts) {
1438                         for (Post post : posts) {
1439                                 knownPosts.add(post.getId());
1440                         }
1441                 }
1442                 synchronized (knownReplies) {
1443                         for (PostReply reply : replies) {
1444                                 knownReplies.add(reply.getId());
1445                         }
1446                 }
1447         }
1448
1449         /**
1450          * Creates a new post.
1451          *
1452          * @param sone
1453          *            The Sone that creates the post
1454          * @param text
1455          *            The text of the post
1456          * @return The created post
1457          */
1458         public Post createPost(Sone sone, String text) {
1459                 return createPost(sone, System.currentTimeMillis(), text);
1460         }
1461
1462         /**
1463          * Creates a new post.
1464          *
1465          * @param sone
1466          *            The Sone that creates the post
1467          * @param time
1468          *            The time of the post
1469          * @param text
1470          *            The text of the post
1471          * @return The created post
1472          */
1473         public Post createPost(Sone sone, long time, String text) {
1474                 return createPost(sone, null, time, text);
1475         }
1476
1477         /**
1478          * Creates a new post.
1479          *
1480          * @param sone
1481          *            The Sone that creates the post
1482          * @param recipient
1483          *            The recipient Sone, or {@code null} if this post does not have
1484          *            a recipient
1485          * @param text
1486          *            The text of the post
1487          * @return The created post
1488          */
1489         public Post createPost(Sone sone, Sone recipient, String text) {
1490                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1491         }
1492
1493         /**
1494          * Creates a new post.
1495          *
1496          * @param sone
1497          *            The Sone that creates the post
1498          * @param recipient
1499          *            The recipient Sone, or {@code null} if this post does not have
1500          *            a recipient
1501          * @param time
1502          *            The time of the post
1503          * @param text
1504          *            The text of the post
1505          * @return The created post
1506          */
1507         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1508                 checkNotNull(text, "text must not be null");
1509                 checkArgument(text.trim().length() > 0, "text must not be empty");
1510                 if (!sone.isLocal()) {
1511                         logger.log(Level.FINE, String.format("Tried to create post for non-local Sone: %s", sone));
1512                         return null;
1513                 }
1514                 PostBuilder postBuilder = postBuilderFactory.newPostBuilder();
1515                 postBuilder.from(sone.getId()).randomId().withTime(time).withText(text.trim());
1516                 if (recipient != null) {
1517                         postBuilder.to(recipient.getId());
1518                 }
1519                 final Post post = postBuilder.build();
1520                 synchronized (posts) {
1521                         posts.put(post.getId(), post);
1522                 }
1523                 eventBus.post(new NewPostFoundEvent(post));
1524                 sone.addPost(post);
1525                 touchConfiguration();
1526                 localElementTicker.schedule(new Runnable() {
1527
1528                         /**
1529                          * {@inheritDoc}
1530                          */
1531                         @Override
1532                         public void run() {
1533                                 markPostKnown(post);
1534                         }
1535                 }, 10, TimeUnit.SECONDS);
1536                 return post;
1537         }
1538
1539         /**
1540          * Deletes the given post.
1541          *
1542          * @param post
1543          *            The post to delete
1544          */
1545         public void deletePost(Post post) {
1546                 if (!post.getSone().isLocal()) {
1547                         logger.log(Level.WARNING, String.format("Tried to delete post of non-local Sone: %s", post.getSone()));
1548                         return;
1549                 }
1550                 post.getSone().removePost(post);
1551                 synchronized (posts) {
1552                         posts.remove(post.getId());
1553                 }
1554                 eventBus.post(new PostRemovedEvent(post));
1555                 markPostKnown(post);
1556                 touchConfiguration();
1557         }
1558
1559         /**
1560          * Marks the given post as known, if it is currently not a known post
1561          * (according to {@link Post#isKnown()}).
1562          *
1563          * @param post
1564          *            The post to mark as known
1565          */
1566         public void markPostKnown(Post post) {
1567                 post.setKnown(true);
1568                 synchronized (knownPosts) {
1569                         eventBus.post(new MarkPostKnownEvent(post));
1570                         if (knownPosts.add(post.getId())) {
1571                                 touchConfiguration();
1572                         }
1573                 }
1574                 for (PostReply reply : getReplies(post)) {
1575                         markReplyKnown(reply);
1576                 }
1577         }
1578
1579         /**
1580          * Bookmarks the given post.
1581          *
1582          * @param post
1583          *            The post to bookmark
1584          */
1585         public void bookmark(Post post) {
1586                 bookmarkPost(post.getId());
1587         }
1588
1589         /**
1590          * Bookmarks the post with the given ID.
1591          *
1592          * @param id
1593          *            The ID of the post to bookmark
1594          */
1595         public void bookmarkPost(String id) {
1596                 synchronized (bookmarkedPosts) {
1597                         bookmarkedPosts.add(id);
1598                 }
1599         }
1600
1601         /**
1602          * Removes the given post from the bookmarks.
1603          *
1604          * @param post
1605          *            The post to unbookmark
1606          */
1607         public void unbookmark(Post post) {
1608                 unbookmarkPost(post.getId());
1609         }
1610
1611         /**
1612          * Removes the post with the given ID from the bookmarks.
1613          *
1614          * @param id
1615          *            The ID of the post to unbookmark
1616          */
1617         public void unbookmarkPost(String id) {
1618                 synchronized (bookmarkedPosts) {
1619                         bookmarkedPosts.remove(id);
1620                 }
1621         }
1622
1623         /**
1624          * Creates a new reply.
1625          *
1626          * @param sone
1627          *            The Sone that creates the reply
1628          * @param post
1629          *            The post that this reply refers to
1630          * @param text
1631          *            The text of the reply
1632          * @return The created reply
1633          */
1634         public PostReply createReply(Sone sone, Post post, String text) {
1635                 checkNotNull(text, "text must not be null");
1636                 checkArgument(text.trim().length() > 0, "text must not be empty");
1637                 if (!sone.isLocal()) {
1638                         logger.log(Level.FINE, String.format("Tried to create reply for non-local Sone: %s", sone));
1639                         return null;
1640                 }
1641                 PostReplyBuilder postReplyBuilder = postReplyBuilderFactory.newPostReplyBuilder();
1642                 postReplyBuilder.randomId().from(sone.getId()).to(post.getId()).currentTime().withText(text.trim());
1643                 final PostReply reply = postReplyBuilder.build();
1644                 synchronized (replies) {
1645                         replies.put(reply.getId(), reply);
1646                 }
1647                 synchronized (knownReplies) {
1648                         eventBus.post(new NewPostReplyFoundEvent(reply));
1649                 }
1650                 sone.addReply(reply);
1651                 touchConfiguration();
1652                 localElementTicker.schedule(new Runnable() {
1653
1654                         /**
1655                          * {@inheritDoc}
1656                          */
1657                         @Override
1658                         public void run() {
1659                                 markReplyKnown(reply);
1660                         }
1661                 }, 10, TimeUnit.SECONDS);
1662                 return reply;
1663         }
1664
1665         /**
1666          * Deletes the given reply.
1667          *
1668          * @param reply
1669          *            The reply to delete
1670          */
1671         public void deleteReply(PostReply reply) {
1672                 Sone sone = reply.getSone();
1673                 if (!sone.isLocal()) {
1674                         logger.log(Level.FINE, String.format("Tried to delete non-local reply: %s", reply));
1675                         return;
1676                 }
1677                 synchronized (replies) {
1678                         replies.remove(reply.getId());
1679                 }
1680                 synchronized (knownReplies) {
1681                         markReplyKnown(reply);
1682                         knownReplies.remove(reply.getId());
1683                 }
1684                 sone.removeReply(reply);
1685                 touchConfiguration();
1686         }
1687
1688         /**
1689          * Marks the given reply as known, if it is currently not a known reply
1690          * (according to {@link Reply#isKnown()}).
1691          *
1692          * @param reply
1693          *            The reply to mark as known
1694          */
1695         public void markReplyKnown(PostReply reply) {
1696                 reply.setKnown(true);
1697                 synchronized (knownReplies) {
1698                         eventBus.post(new MarkPostReplyKnownEvent(reply));
1699                         if (knownReplies.add(reply.getId())) {
1700                                 touchConfiguration();
1701                         }
1702                 }
1703         }
1704
1705         /**
1706          * Creates a new top-level album for the given Sone.
1707          *
1708          * @param sone
1709          *            The Sone to create the album for
1710          * @return The new album
1711          */
1712         public Album createAlbum(Sone sone) {
1713                 return createAlbum(sone, null);
1714         }
1715
1716         /**
1717          * Creates a new album for the given Sone.
1718          *
1719          * @param sone
1720          *            The Sone to create the album for
1721          * @param parent
1722          *            The parent of the album (may be {@code null} to create a
1723          *            top-level album)
1724          * @return The new album
1725          */
1726         public Album createAlbum(Sone sone, Album parent) {
1727                 Album album = new Album();
1728                 synchronized (albums) {
1729                         albums.put(album.getId(), album);
1730                 }
1731                 album.setSone(sone);
1732                 if (parent != null) {
1733                         parent.addAlbum(album);
1734                 } else {
1735                         sone.addAlbum(album);
1736                 }
1737                 return album;
1738         }
1739
1740         /**
1741          * Deletes the given album. The owner of the album has to be a local Sone,
1742          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1743          *
1744          * @param album
1745          *            The album to remove
1746          */
1747         public void deleteAlbum(Album album) {
1748                 checkNotNull(album, "album must not be null");
1749                 checkArgument(album.getSone().isLocal(), "album’s Sone must be a local Sone");
1750                 if (!album.isEmpty()) {
1751                         return;
1752                 }
1753                 if (album.getParent() == null) {
1754                         album.getSone().removeAlbum(album);
1755                 } else {
1756                         album.getParent().removeAlbum(album);
1757                 }
1758                 synchronized (albums) {
1759                         albums.remove(album.getId());
1760                 }
1761                 touchConfiguration();
1762         }
1763
1764         /**
1765          * Creates a new image.
1766          *
1767          * @param sone
1768          *            The Sone creating the image
1769          * @param album
1770          *            The album the image will be inserted into
1771          * @param temporaryImage
1772          *            The temporary image to create the image from
1773          * @return The newly created image
1774          */
1775         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1776                 checkNotNull(sone, "sone must not be null");
1777                 checkNotNull(album, "album must not be null");
1778                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1779                 checkArgument(sone.isLocal(), "sone must be a local Sone");
1780                 checkArgument(sone.equals(album.getSone()), "album must belong to the given Sone");
1781                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1782                 album.addImage(image);
1783                 synchronized (images) {
1784                         images.put(image.getId(), image);
1785                 }
1786                 imageInserter.insertImage(temporaryImage, image);
1787                 return image;
1788         }
1789
1790         /**
1791          * Deletes the given image. This method will also delete a matching
1792          * temporary image.
1793          *
1794          * @see #deleteTemporaryImage(TemporaryImage)
1795          * @param image
1796          *            The image to delete
1797          */
1798         public void deleteImage(Image image) {
1799                 checkNotNull(image, "image must not be null");
1800                 checkArgument(image.getSone().isLocal(), "image must belong to a local Sone");
1801                 deleteTemporaryImage(image.getId());
1802                 image.getAlbum().removeImage(image);
1803                 synchronized (images) {
1804                         images.remove(image.getId());
1805                 }
1806                 touchConfiguration();
1807         }
1808
1809         /**
1810          * Creates a new temporary image.
1811          *
1812          * @param mimeType
1813          *            The MIME type of the temporary image
1814          * @param imageData
1815          *            The encoded data of the image
1816          * @return The temporary image
1817          */
1818         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1819                 TemporaryImage temporaryImage = new TemporaryImage();
1820                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1821                 synchronized (temporaryImages) {
1822                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1823                 }
1824                 return temporaryImage;
1825         }
1826
1827         /**
1828          * Deletes the given temporary image.
1829          *
1830          * @param temporaryImage
1831          *            The temporary image to delete
1832          */
1833         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1834                 checkNotNull(temporaryImage, "temporaryImage must not be null");
1835                 deleteTemporaryImage(temporaryImage.getId());
1836         }
1837
1838         /**
1839          * Deletes the temporary image with the given ID.
1840          *
1841          * @param imageId
1842          *            The ID of the temporary image to delete
1843          */
1844         public void deleteTemporaryImage(String imageId) {
1845                 checkNotNull(imageId, "imageId must not be null");
1846                 synchronized (temporaryImages) {
1847                         temporaryImages.remove(imageId);
1848                 }
1849                 Image image = getImage(imageId, false);
1850                 if (image != null) {
1851                         imageInserter.cancelImageInsert(image);
1852                 }
1853         }
1854
1855         /**
1856          * Notifies the core that the configuration, either of the core or of a
1857          * single local Sone, has changed, and that the configuration should be
1858          * saved.
1859          */
1860         public void touchConfiguration() {
1861                 lastConfigurationUpdate = System.currentTimeMillis();
1862         }
1863
1864         //
1865         // SERVICE METHODS
1866         //
1867
1868         /**
1869          * Starts the core.
1870          */
1871         @Override
1872         public void serviceStart() {
1873                 loadConfiguration();
1874                 updateChecker.start();
1875                 identityManager.start();
1876                 webOfTrustUpdater.init();
1877                 webOfTrustUpdater.start();
1878         }
1879
1880         /**
1881          * {@inheritDoc}
1882          */
1883         @Override
1884         public void serviceRun() {
1885                 long lastSaved = System.currentTimeMillis();
1886                 while (!shouldStop()) {
1887                         sleep(1000);
1888                         long now = System.currentTimeMillis();
1889                         if (shouldStop() || ((lastConfigurationUpdate > lastSaved) && ((now - lastConfigurationUpdate) > 5000))) {
1890                                 for (Sone localSone : getLocalSones()) {
1891                                         saveSone(localSone);
1892                                 }
1893                                 saveConfiguration();
1894                                 lastSaved = now;
1895                         }
1896                 }
1897         }
1898
1899         /**
1900          * Stops the core.
1901          */
1902         @Override
1903         public void serviceStop() {
1904                 localElementTicker.shutdownNow();
1905                 synchronized (sones) {
1906                         for (Entry<Sone, SoneInserter> soneInserter : soneInserters.entrySet()) {
1907                                 soneInserter.getValue().stop();
1908                                 saveSone(soneInserter.getKey());
1909                         }
1910                 }
1911                 saveConfiguration();
1912                 webOfTrustUpdater.stop();
1913                 updateChecker.stop();
1914                 soneDownloader.stop();
1915                 soneDownloaders.shutdown();
1916                 identityManager.stop();
1917         }
1918
1919         //
1920         // PRIVATE METHODS
1921         //
1922
1923         /**
1924          * Saves the given Sone. This will persist all local settings for the given
1925          * Sone, such as the friends list and similar, private options.
1926          *
1927          * @param sone
1928          *            The Sone to save
1929          */
1930         private synchronized void saveSone(Sone sone) {
1931                 if (!sone.isLocal()) {
1932                         logger.log(Level.FINE, String.format("Tried to save non-local Sone: %s", sone));
1933                         return;
1934                 }
1935                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1936                         logger.log(Level.WARNING, String.format("Local Sone without OwnIdentity found, refusing to save: %s", sone));
1937                         return;
1938                 }
1939
1940                 logger.log(Level.INFO, String.format("Saving Sone: %s", sone));
1941                 try {
1942                         /* save Sone into configuration. */
1943                         String sonePrefix = "Sone/" + sone.getId();
1944                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1945                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1946
1947                         /* save profile. */
1948                         Profile profile = sone.getProfile();
1949                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1950                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1951                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1952                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1953                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1954                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1955                         configuration.getStringValue(sonePrefix + "/Profile/Avatar").setValue(profile.getAvatar());
1956
1957                         /* save profile fields. */
1958                         int fieldCounter = 0;
1959                         for (Field profileField : profile.getFields()) {
1960                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1961                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1962                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1963                         }
1964                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1965
1966                         /* save posts. */
1967                         int postCounter = 0;
1968                         for (Post post : sone.getPosts()) {
1969                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1970                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1971                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1972                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1973                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1974                         }
1975                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1976
1977                         /* save replies. */
1978                         int replyCounter = 0;
1979                         for (PostReply reply : sone.getReplies()) {
1980                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1981                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1982                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPostId());
1983                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1984                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1985                         }
1986                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1987
1988                         /* save post likes. */
1989                         int postLikeCounter = 0;
1990                         for (String postId : sone.getLikedPostIds()) {
1991                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1992                         }
1993                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1994
1995                         /* save reply likes. */
1996                         int replyLikeCounter = 0;
1997                         for (String replyId : sone.getLikedReplyIds()) {
1998                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1999                         }
2000                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
2001
2002                         /* save friends. */
2003                         int friendCounter = 0;
2004                         for (String friendId : sone.getFriends()) {
2005                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
2006                         }
2007                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
2008
2009                         /* save albums. first, collect in a flat structure, top-level first. */
2010                         List<Album> albums = sone.getAllAlbums();
2011
2012                         int albumCounter = 0;
2013                         for (Album album : albums) {
2014                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
2015                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
2016                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
2017                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
2018                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
2019                                 configuration.getStringValue(albumPrefix + "/AlbumImage").setValue(album.getAlbumImage() == null ? null : album.getAlbumImage().getId());
2020                         }
2021                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
2022
2023                         /* save images. */
2024                         int imageCounter = 0;
2025                         for (Album album : albums) {
2026                                 for (Image image : album.getImages()) {
2027                                         if (!image.isInserted()) {
2028                                                 continue;
2029                                         }
2030                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
2031                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
2032                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
2033                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
2034                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
2035                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
2036                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
2037                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
2038                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
2039                                 }
2040                         }
2041                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
2042
2043                         /* save options. */
2044                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
2045                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewSones").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewSones").getReal());
2046                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewPosts").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewPosts").getReal());
2047                         configuration.getBooleanValue(sonePrefix + "/Options/ShowNotification/NewReplies").setValue(sone.getOptions().getBooleanOption("ShowNotification/NewReplies").getReal());
2048                         configuration.getBooleanValue(sonePrefix + "/Options/EnableSoneInsertNotifications").setValue(sone.getOptions().getBooleanOption("EnableSoneInsertNotifications").getReal());
2049                         configuration.getStringValue(sonePrefix + "/Options/ShowCustomAvatars").setValue(sone.getOptions().<ShowCustomAvatars> getEnumOption("ShowCustomAvatars").get().name());
2050
2051                         configuration.save();
2052
2053                         webOfTrustUpdater.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
2054
2055                         logger.log(Level.INFO, String.format("Sone %s saved.", sone));
2056                 } catch (ConfigurationException ce1) {
2057                         logger.log(Level.WARNING, String.format("Could not save Sone: %s", sone), ce1);
2058                 }
2059         }
2060
2061         /**
2062          * Saves the current options.
2063          */
2064         private void saveConfiguration() {
2065                 synchronized (configuration) {
2066                         if (storingConfiguration) {
2067                                 logger.log(Level.FINE, "Already storing configuration…");
2068                                 return;
2069                         }
2070                         storingConfiguration = true;
2071                 }
2072
2073                 /* store the options first. */
2074                 try {
2075                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
2076                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
2077                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
2078                         configuration.getIntValue("Option/ImagesPerPage").setValue(options.getIntegerOption("ImagesPerPage").getReal());
2079                         configuration.getIntValue("Option/CharactersPerPost").setValue(options.getIntegerOption("CharactersPerPost").getReal());
2080                         configuration.getIntValue("Option/PostCutOffLength").setValue(options.getIntegerOption("PostCutOffLength").getReal());
2081                         configuration.getBooleanValue("Option/RequireFullAccess").setValue(options.getBooleanOption("RequireFullAccess").getReal());
2082                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
2083                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
2084                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
2085                         configuration.getBooleanValue("Option/ActivateFcpInterface").setValue(options.getBooleanOption("ActivateFcpInterface").getReal());
2086                         configuration.getIntValue("Option/FcpFullAccessRequired").setValue(options.getIntegerOption("FcpFullAccessRequired").getReal());
2087
2088                         /* save known Sones. */
2089                         int soneCounter = 0;
2090                         synchronized (knownSones) {
2091                                 for (String knownSoneId : knownSones) {
2092                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
2093                                 }
2094                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
2095                         }
2096
2097                         /* save Sone following times. */
2098                         soneCounter = 0;
2099                         synchronized (soneFollowingTimes) {
2100                                 for (Entry<Sone, Long> soneFollowingTime : soneFollowingTimes.entrySet()) {
2101                                         configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(soneFollowingTime.getKey().getId());
2102                                         configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").setValue(soneFollowingTime.getValue());
2103                                         ++soneCounter;
2104                                 }
2105                                 configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").setValue(null);
2106                         }
2107
2108                         /* save known posts. */
2109                         int postCounter = 0;
2110                         synchronized (knownPosts) {
2111                                 for (String knownPostId : knownPosts) {
2112                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
2113                                 }
2114                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
2115                         }
2116
2117                         /* save known replies. */
2118                         int replyCounter = 0;
2119                         synchronized (knownReplies) {
2120                                 for (String knownReplyId : knownReplies) {
2121                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
2122                                 }
2123                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
2124                         }
2125
2126                         /* save bookmarked posts. */
2127                         int bookmarkedPostCounter = 0;
2128                         synchronized (bookmarkedPosts) {
2129                                 for (String bookmarkedPostId : bookmarkedPosts) {
2130                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
2131                                 }
2132                         }
2133                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
2134
2135                         /* now save it. */
2136                         configuration.save();
2137
2138                 } catch (ConfigurationException ce1) {
2139                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2140                 } finally {
2141                         synchronized (configuration) {
2142                                 storingConfiguration = false;
2143                         }
2144                 }
2145         }
2146
2147         /**
2148          * Loads the configuration.
2149          */
2150         @SuppressWarnings("unchecked")
2151         private void loadConfiguration() {
2152                 /* create options. */
2153                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new IntegerRangePredicate(0, Integer.MAX_VALUE), new OptionWatcher<Integer>() {
2154
2155                         @Override
2156                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2157                                 SoneInserter.setInsertionDelay(newValue);
2158                         }
2159
2160                 }));
2161                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2162                 options.addIntegerOption("ImagesPerPage", new DefaultOption<Integer>(9, new IntegerRangePredicate(1, Integer.MAX_VALUE)));
2163                 options.addIntegerOption("CharactersPerPost", new DefaultOption<Integer>(400, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2164                 options.addIntegerOption("PostCutOffLength", new DefaultOption<Integer>(200, Predicates.<Integer> or(new IntegerRangePredicate(50, Integer.MAX_VALUE), Predicates.equalTo(-1))));
2165                 options.addBooleanOption("RequireFullAccess", new DefaultOption<Boolean>(false));
2166                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75, new IntegerRangePredicate(0, 100)));
2167                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25, new IntegerRangePredicate(-100, 100)));
2168                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2169                 options.addBooleanOption("ActivateFcpInterface", new DefaultOption<Boolean>(false, new OptionWatcher<Boolean>() {
2170
2171                         @Override
2172                         @SuppressWarnings("synthetic-access")
2173                         public void optionChanged(Option<Boolean> option, Boolean oldValue, Boolean newValue) {
2174                                 fcpInterface.setActive(newValue);
2175                         }
2176                 }));
2177                 options.addIntegerOption("FcpFullAccessRequired", new DefaultOption<Integer>(2, new OptionWatcher<Integer>() {
2178
2179                         @Override
2180                         @SuppressWarnings("synthetic-access")
2181                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2182                                 fcpInterface.setFullAccessRequired(FullAccessRequired.values()[newValue]);
2183                         }
2184
2185                 }));
2186
2187                 loadConfigurationValue("InsertionDelay");
2188                 loadConfigurationValue("PostsPerPage");
2189                 loadConfigurationValue("ImagesPerPage");
2190                 loadConfigurationValue("CharactersPerPost");
2191                 loadConfigurationValue("PostCutOffLength");
2192                 options.getBooleanOption("RequireFullAccess").set(configuration.getBooleanValue("Option/RequireFullAccess").getValue(null));
2193                 loadConfigurationValue("PositiveTrust");
2194                 loadConfigurationValue("NegativeTrust");
2195                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2196                 options.getBooleanOption("ActivateFcpInterface").set(configuration.getBooleanValue("Option/ActivateFcpInterface").getValue(null));
2197                 options.getIntegerOption("FcpFullAccessRequired").set(configuration.getIntValue("Option/FcpFullAccessRequired").getValue(null));
2198
2199                 /* load known Sones. */
2200                 int soneCounter = 0;
2201                 while (true) {
2202                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2203                         if (knownSoneId == null) {
2204                                 break;
2205                         }
2206                         synchronized (knownSones) {
2207                                 knownSones.add(knownSoneId);
2208                         }
2209                 }
2210
2211                 /* load Sone following times. */
2212                 soneCounter = 0;
2213                 while (true) {
2214                         String soneId = configuration.getStringValue("SoneFollowingTimes/" + soneCounter + "/Sone").getValue(null);
2215                         if (soneId == null) {
2216                                 break;
2217                         }
2218                         long time = configuration.getLongValue("SoneFollowingTimes/" + soneCounter + "/Time").getValue(Long.MAX_VALUE);
2219                         Sone followedSone = getSone(soneId);
2220                         if (followedSone == null) {
2221                                 logger.log(Level.WARNING, String.format("Ignoring Sone with invalid ID: %s", soneId));
2222                         } else {
2223                                 synchronized (soneFollowingTimes) {
2224                                         soneFollowingTimes.put(getSone(soneId), time);
2225                                 }
2226                         }
2227                         ++soneCounter;
2228                 }
2229
2230                 /* load known posts. */
2231                 int postCounter = 0;
2232                 while (true) {
2233                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2234                         if (knownPostId == null) {
2235                                 break;
2236                         }
2237                         synchronized (knownPosts) {
2238                                 knownPosts.add(knownPostId);
2239                         }
2240                 }
2241
2242                 /* load known replies. */
2243                 int replyCounter = 0;
2244                 while (true) {
2245                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2246                         if (knownReplyId == null) {
2247                                 break;
2248                         }
2249                         synchronized (knownReplies) {
2250                                 knownReplies.add(knownReplyId);
2251                         }
2252                 }
2253
2254                 /* load bookmarked posts. */
2255                 int bookmarkedPostCounter = 0;
2256                 while (true) {
2257                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2258                         if (bookmarkedPostId == null) {
2259                                 break;
2260                         }
2261                         synchronized (bookmarkedPosts) {
2262                                 bookmarkedPosts.add(bookmarkedPostId);
2263                         }
2264                 }
2265
2266         }
2267
2268         /**
2269          * Loads an {@link Integer} configuration value for the option with the
2270          * given name, logging validation failures.
2271          *
2272          * @param optionName
2273          *            The name of the option to load
2274          */
2275         private void loadConfigurationValue(String optionName) {
2276                 try {
2277                         options.getIntegerOption(optionName).set(configuration.getIntValue("Option/" + optionName).getValue(null));
2278                 } catch (IllegalArgumentException iae1) {
2279                         logger.log(Level.WARNING, String.format("Invalid value for %s in configuration, using default.", optionName));
2280                 }
2281         }
2282
2283         /**
2284          * Notifies the core that a new {@link OwnIdentity} was added.
2285          *
2286          * @param ownIdentityAddedEvent
2287          *            The event
2288          */
2289         @Subscribe
2290         public void ownIdentityAdded(OwnIdentityAddedEvent ownIdentityAddedEvent) {
2291                 OwnIdentity ownIdentity = ownIdentityAddedEvent.ownIdentity();
2292                 logger.log(Level.FINEST, String.format("Adding OwnIdentity: %s", ownIdentity));
2293                 if (ownIdentity.hasContext("Sone")) {
2294                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2295                         addLocalSone(ownIdentity);
2296                 }
2297         }
2298
2299         /**
2300          * Notifies the core that an {@link OwnIdentity} was removed.
2301          *
2302          * @param ownIdentityRemovedEvent
2303          *            The event
2304          */
2305         @Subscribe
2306         public void ownIdentityRemoved(OwnIdentityRemovedEvent ownIdentityRemovedEvent) {
2307                 OwnIdentity ownIdentity = ownIdentityRemovedEvent.ownIdentity();
2308                 logger.log(Level.FINEST, String.format("Removing OwnIdentity: %s", ownIdentity));
2309                 trustedIdentities.remove(ownIdentity);
2310         }
2311
2312         /**
2313          * Notifies the core that a new {@link Identity} was added.
2314          *
2315          * @param identityAddedEvent
2316          *            The event
2317          */
2318         @Subscribe
2319         public void identityAdded(IdentityAddedEvent identityAddedEvent) {
2320                 Identity identity = identityAddedEvent.identity();
2321                 logger.log(Level.FINEST, String.format("Adding Identity: %s", identity));
2322                 trustedIdentities.get(identityAddedEvent.ownIdentity()).add(identity);
2323                 addRemoteSone(identity);
2324         }
2325
2326         /**
2327          * Notifies the core that an {@link Identity} was updated.
2328          *
2329          * @param identityUpdatedEvent
2330          *            The event
2331          */
2332         @Subscribe
2333         public void identityUpdated(IdentityUpdatedEvent identityUpdatedEvent) {
2334                 final Identity identity = identityUpdatedEvent.identity();
2335                 soneDownloaders.execute(new Runnable() {
2336
2337                         @Override
2338                         @SuppressWarnings("synthetic-access")
2339                         public void run() {
2340                                 Sone sone = getRemoteSone(identity.getId(), false);
2341                                 sone.setIdentity(identity);
2342                                 sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), sone.getLatestEdition()));
2343                                 soneDownloader.addSone(sone);
2344                                 soneDownloader.fetchSone(sone);
2345                         }
2346                 });
2347         }
2348
2349         /**
2350          * Notifies the core that an {@link Identity} was removed.
2351          *
2352          * @param identityRemovedEvent
2353          *            The event
2354          */
2355         @Subscribe
2356         public void identityRemoved(IdentityRemovedEvent identityRemovedEvent) {
2357                 OwnIdentity ownIdentity = identityRemovedEvent.ownIdentity();
2358                 Identity identity = identityRemovedEvent.identity();
2359                 trustedIdentities.get(ownIdentity).remove(identity);
2360                 boolean foundIdentity = false;
2361                 for (Entry<OwnIdentity, Set<Identity>> trustedIdentity : trustedIdentities.entrySet()) {
2362                         if (trustedIdentity.getKey().equals(ownIdentity)) {
2363                                 continue;
2364                         }
2365                         if (trustedIdentity.getValue().contains(identity)) {
2366                                 foundIdentity = true;
2367                         }
2368                 }
2369                 if (foundIdentity) {
2370                         /* some local identity still trusts this identity, don’t remove. */
2371                         return;
2372                 }
2373                 Sone sone = getSone(identity.getId(), false);
2374                 if (sone == null) {
2375                         /* TODO - we don’t have the Sone anymore. should this happen? */
2376                         return;
2377                 }
2378                 synchronized (posts) {
2379                         synchronized (knownPosts) {
2380                                 for (Post post : sone.getPosts()) {
2381                                         posts.remove(post.getId());
2382                                         eventBus.post(new PostRemovedEvent(post));
2383                                 }
2384                         }
2385                 }
2386                 synchronized (replies) {
2387                         synchronized (knownReplies) {
2388                                 for (PostReply reply : sone.getReplies()) {
2389                                         replies.remove(reply.getId());
2390                                         eventBus.post(new PostReplyRemovedEvent(reply));
2391                                 }
2392                         }
2393                 }
2394                 synchronized (sones) {
2395                         sones.remove(identity.getId());
2396                 }
2397                 eventBus.post(new SoneRemovedEvent(sone));
2398         }
2399
2400         /**
2401          * Deletes the temporary image.
2402          *
2403          * @param imageInsertFinishedEvent
2404          *            The event
2405          */
2406         @Subscribe
2407         public void imageInsertFinished(ImageInsertFinishedEvent imageInsertFinishedEvent) {
2408                 logger.log(Level.WARNING, String.format("Image insert finished for %s: %s", imageInsertFinishedEvent.image(), imageInsertFinishedEvent.resultingUri()));
2409                 imageInsertFinishedEvent.image().setKey(imageInsertFinishedEvent.resultingUri().toString());
2410                 deleteTemporaryImage(imageInsertFinishedEvent.image().getId());
2411                 touchConfiguration();
2412         }
2413
2414 }