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

   1 /*
   2  * Sone - Core.java - Copyright © 2010 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 java.net.MalformedURLException;
  21 import java.util.ArrayList;
  22 import java.util.Collections;
  23 import java.util.HashMap;
  24 import java.util.HashSet;
  25 import java.util.List;
  26 import java.util.Map;
  27 import java.util.Set;
  28 import java.util.logging.Level;
  29 import java.util.logging.Logger;
  30
  31 import net.pterodactylus.sone.core.Options.DefaultOption;
  32 import net.pterodactylus.sone.core.Options.Option;
  33 import net.pterodactylus.sone.core.Options.OptionWatcher;
  34 import net.pterodactylus.sone.data.Album;
  35 import net.pterodactylus.sone.data.Client;
  36 import net.pterodactylus.sone.data.Image;
  37 import net.pterodactylus.sone.data.Post;
  38 import net.pterodactylus.sone.data.Profile;
  39 import net.pterodactylus.sone.data.Profile.Field;
  40 import net.pterodactylus.sone.data.Reply;
  41 import net.pterodactylus.sone.data.Sone;
  42 import net.pterodactylus.sone.data.TemporaryImage;
  43 import net.pterodactylus.sone.freenet.wot.Identity;
  44 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  45 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  46 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  47 import net.pterodactylus.sone.freenet.wot.Trust;
  48 import net.pterodactylus.sone.freenet.wot.WebOfTrustException;
  49 import net.pterodactylus.sone.main.SonePlugin;
  50 import net.pterodactylus.util.config.Configuration;
  51 import net.pterodactylus.util.config.ConfigurationException;
  52 import net.pterodactylus.util.logging.Logging;
  53 import net.pterodactylus.util.number.Numbers;
  54 import net.pterodactylus.util.validation.Validation;
  55 import net.pterodactylus.util.version.Version;
  56 import freenet.keys.FreenetURI;
  57
  58 /**
  59  * The Sone core.
  60  *
  61  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  62  */
  63 public class Core implements IdentityListener, UpdateListener, ImageInsertListener {
  64
  65         /**
  66          * Enumeration for the possible states of a {@link Sone}.
  67          *
  68          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  69          */
  70         public enum SoneStatus {
  71
  72                 /** The Sone is unknown, i.e. not yet downloaded. */
  73                 unknown,
  74
  75                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  76                 idle,
  77
  78                 /** The Sone is currently being inserted. */
  79                 inserting,
  80
  81                 /** The Sone is currently being downloaded. */
  82                 downloading,
  83         }
  84
  85         /** The logger. */
  86         private static final Logger logger = Logging.getLogger(Core.class);
  87
  88         /** The options. */
  89         private final Options options = new Options();
  90
  91         /** The preferences. */
  92         private final Preferences preferences = new Preferences(options);
  93
  94         /** The core listener manager. */
  95         private final CoreListenerManager coreListenerManager = new CoreListenerManager(this);
  96
  97         /** The configuration. */
  98         private Configuration configuration;
  99
 100         /** Whether we’re currently saving the configuration. */
 101         private boolean storingConfiguration = false;
 102
 103         /** The identity manager. */
 104         private final IdentityManager identityManager;
 105
 106         /** Interface to freenet. */
 107         private final FreenetInterface freenetInterface;
 108
 109         /** The Sone downloader. */
 110         private final SoneDownloader soneDownloader;
 111
 112         /** The image inserter. */
 113         private final ImageInserter imageInserter;
 114
 115         /** The update checker. */
 116         private final UpdateChecker updateChecker;
 117
 118         /** Whether the core has been stopped. */
 119         private volatile boolean stopped;
 120
 121         /** The Sones’ statuses. */
 122         /* synchronize access on itself. */
 123         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
 124
 125         /** Locked local Sones. */
 126         /* synchronize on itself. */
 127         private final Set<Sone> lockedSones = new HashSet<Sone>();
 128
 129         /** Sone inserters. */
 130         /* synchronize access on this on localSones. */
 131         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 132
 133         /** All local Sones. */
 134         /* synchronize access on this on itself. */
 135         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 136
 137         /** All remote Sones. */
 138         /* synchronize access on this on itself. */
 139         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 140
 141         /** All new Sones. */
 142         private Set<String> newSones = new HashSet<String>();
 143
 144         /** All known Sones. */
 145         /* synchronize access on {@link #newSones}. */
 146         private Set<String> knownSones = new HashSet<String>();
 147
 148         /** All posts. */
 149         private Map<String, Post> posts = new HashMap<String, Post>();
 150
 151         /** All new posts. */
 152         private Set<String> newPosts = new HashSet<String>();
 153
 154         /** All known posts. */
 155         /* synchronize access on {@link #newPosts}. */
 156         private Set<String> knownPosts = new HashSet<String>();
 157
 158         /** All replies. */
 159         private Map<String, Reply> replies = new HashMap<String, Reply>();
 160
 161         /** All new replies. */
 162         private Set<String> newReplies = new HashSet<String>();
 163
 164         /** All known replies. */
 165         private Set<String> knownReplies = new HashSet<String>();
 166
 167         /** All bookmarked posts. */
 168         /* synchronize access on itself. */
 169         private Set<String> bookmarkedPosts = new HashSet<String>();
 170
 171         /** Trusted identities, sorted by own identities. */
 172         private Map<OwnIdentity, Set<Identity>> trustedIdentities = Collections.synchronizedMap(new HashMap<OwnIdentity, Set<Identity>>());
 173
 174         /** All known albums. */
 175         private Map<String, Album> albums = new HashMap<String, Album>();
 176
 177         /** All known images. */
 178         private Map<String, Image> images = new HashMap<String, Image>();
 179
 180         /** All temporary images. */
 181         private Map<String, TemporaryImage> temporaryImages = new HashMap<String, TemporaryImage>();
 182
 183         /**
 184          * Creates a new core.
 185          *
 186          * @param configuration
 187          *            The configuration of the core
 188          * @param freenetInterface
 189          *            The freenet interface
 190          * @param identityManager
 191          *            The identity manager
 192          */
 193         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 194                 this.configuration = configuration;
 195                 this.freenetInterface = freenetInterface;
 196                 this.identityManager = identityManager;
 197                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 198                 this.imageInserter = new ImageInserter(this, freenetInterface);
 199                 this.updateChecker = new UpdateChecker(freenetInterface);
 200         }
 201
 202         //
 203         // LISTENER MANAGEMENT
 204         //
 205
 206         /**
 207          * Adds a new core listener.
 208          *
 209          * @param coreListener
 210          *            The listener to add
 211          */
 212         public void addCoreListener(CoreListener coreListener) {
 213                 coreListenerManager.addListener(coreListener);
 214         }
 215
 216         /**
 217          * Removes a core listener.
 218          *
 219          * @param coreListener
 220          *            The listener to remove
 221          */
 222         public void removeCoreListener(CoreListener coreListener) {
 223                 coreListenerManager.removeListener(coreListener);
 224         }
 225
 226         //
 227         // ACCESSORS
 228         //
 229
 230         /**
 231          * Sets the configuration to use. This will automatically save the current
 232          * configuration to the given configuration.
 233          *
 234          * @param configuration
 235          *            The new configuration to use
 236          */
 237         public void setConfiguration(Configuration configuration) {
 238                 this.configuration = configuration;
 239                 saveConfiguration();
 240         }
 241
 242         /**
 243          * Returns the options used by the core.
 244          *
 245          * @return The options of the core
 246          */
 247         public Preferences getPreferences() {
 248                 return preferences;
 249         }
 250
 251         /**
 252          * Returns the identity manager used by the core.
 253          *
 254          * @return The identity manager
 255          */
 256         public IdentityManager getIdentityManager() {
 257                 return identityManager;
 258         }
 259
 260         /**
 261          * Returns the update checker.
 262          *
 263          * @return The update checker
 264          */
 265         public UpdateChecker getUpdateChecker() {
 266                 return updateChecker;
 267         }
 268
 269         /**
 270          * Returns the status of the given Sone.
 271          *
 272          * @param sone
 273          *            The Sone to get the status for
 274          * @return The status of the Sone
 275          */
 276         public SoneStatus getSoneStatus(Sone sone) {
 277                 synchronized (soneStatuses) {
 278                         return soneStatuses.get(sone);
 279                 }
 280         }
 281
 282         /**
 283          * Sets the status of the given Sone.
 284          *
 285          * @param sone
 286          *            The Sone to set the status of
 287          * @param soneStatus
 288          *            The status to set
 289          */
 290         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 291                 synchronized (soneStatuses) {
 292                         soneStatuses.put(sone, soneStatus);
 293                 }
 294         }
 295
 296         /**
 297          * Returns whether the given Sone is currently locked.
 298          *
 299          * @param sone
 300          *            The sone to check
 301          * @return {@code true} if the Sone is locked, {@code false} if it is not
 302          */
 303         public boolean isLocked(Sone sone) {
 304                 synchronized (lockedSones) {
 305                         return lockedSones.contains(sone);
 306                 }
 307         }
 308
 309         /**
 310          * Returns all Sones, remote and local.
 311          *
 312          * @return All Sones
 313          */
 314         public Set<Sone> getSones() {
 315                 Set<Sone> allSones = new HashSet<Sone>();
 316                 allSones.addAll(getLocalSones());
 317                 allSones.addAll(getRemoteSones());
 318                 return allSones;
 319         }
 320
 321         /**
 322          * Returns the Sone with the given ID, regardless whether it’s local or
 323          * remote.
 324          *
 325          * @param id
 326          *            The ID of the Sone to get
 327          * @return The Sone with the given ID, or {@code null} if there is no such
 328          *         Sone
 329          */
 330         public Sone getSone(String id) {
 331                 return getSone(id, true);
 332         }
 333
 334         /**
 335          * Returns the Sone with the given ID, regardless whether it’s local or
 336          * remote.
 337          *
 338          * @param id
 339          *            The ID of the Sone to get
 340          * @param create
 341          *            {@code true} to create a new Sone if none exists,
 342          *            {@code false} to return {@code null} if a Sone with the given
 343          *            ID does not exist
 344          * @return The Sone with the given ID, or {@code null} if there is no such
 345          *         Sone
 346          */
 347         public Sone getSone(String id, boolean create) {
 348                 if (isLocalSone(id)) {
 349                         return getLocalSone(id);
 350                 }
 351                 return getRemoteSone(id, create);
 352         }
 353
 354         /**
 355          * Checks whether the core knows a Sone with the given ID.
 356          *
 357          * @param id
 358          *            The ID of the Sone
 359          * @return {@code true} if there is a Sone with the given ID, {@code false}
 360          *         otherwise
 361          */
 362         public boolean hasSone(String id) {
 363                 return isLocalSone(id) || isRemoteSone(id);
 364         }
 365
 366         /**
 367          * Returns whether the given Sone is a local Sone.
 368          *
 369          * @param sone
 370          *            The Sone to check for its locality
 371          * @return {@code true} if the given Sone is local, {@code false} otherwise
 372          */
 373         public boolean isLocalSone(Sone sone) {
 374                 synchronized (localSones) {
 375                         return localSones.containsKey(sone.getId());
 376                 }
 377         }
 378
 379         /**
 380          * Returns whether the given ID is the ID of a local Sone.
 381          *
 382          * @param id
 383          *            The Sone ID to check for its locality
 384          * @return {@code true} if the given ID is a local Sone, {@code false}
 385          *         otherwise
 386          */
 387         public boolean isLocalSone(String id) {
 388                 synchronized (localSones) {
 389                         return localSones.containsKey(id);
 390                 }
 391         }
 392
 393         /**
 394          * Returns all local Sones.
 395          *
 396          * @return All local Sones
 397          */
 398         public Set<Sone> getLocalSones() {
 399                 synchronized (localSones) {
 400                         return new HashSet<Sone>(localSones.values());
 401                 }
 402         }
 403
 404         /**
 405          * Returns the local Sone with the given ID.
 406          *
 407          * @param id
 408          *            The ID of the Sone to get
 409          * @return The Sone with the given ID
 410          */
 411         public Sone getLocalSone(String id) {
 412                 return getLocalSone(id, true);
 413         }
 414
 415         /**
 416          * Returns the local Sone with the given ID, optionally creating a new Sone.
 417          *
 418          * @param id
 419          *            The ID of the Sone
 420          * @param create
 421          *            {@code true} to create a new Sone if none exists,
 422          *            {@code false} to return null if none exists
 423          * @return The Sone with the given ID, or {@code null}
 424          */
 425         public Sone getLocalSone(String id, boolean create) {
 426                 synchronized (localSones) {
 427                         Sone sone = localSones.get(id);
 428                         if ((sone == null) && create) {
 429                                 sone = new Sone(id);
 430                                 localSones.put(id, sone);
 431                                 setSoneStatus(sone, SoneStatus.unknown);
 432                         }
 433                         return sone;
 434                 }
 435         }
 436
 437         /**
 438          * Returns all remote Sones.
 439          *
 440          * @return All remote Sones
 441          */
 442         public Set<Sone> getRemoteSones() {
 443                 synchronized (remoteSones) {
 444                         return new HashSet<Sone>(remoteSones.values());
 445                 }
 446         }
 447
 448         /**
 449          * Returns the remote Sone with the given ID.
 450          *
 451          * @param id
 452          *            The ID of the remote Sone to get
 453          * @return The Sone with the given ID
 454          */
 455         public Sone getRemoteSone(String id) {
 456                 return getRemoteSone(id, true);
 457         }
 458
 459         /**
 460          * Returns the remote Sone with the given ID.
 461          *
 462          * @param id
 463          *            The ID of the remote Sone to get
 464          * @param create
 465          *            {@code true} to always create a Sone, {@code false} to return
 466          *            {@code null} if no Sone with the given ID exists
 467          * @return The Sone with the given ID
 468          */
 469         public Sone getRemoteSone(String id, boolean create) {
 470                 synchronized (remoteSones) {
 471                         Sone sone = remoteSones.get(id);
 472                         if ((sone == null) && create) {
 473                                 sone = new Sone(id);
 474                                 remoteSones.put(id, sone);
 475                                 setSoneStatus(sone, SoneStatus.unknown);
 476                         }
 477                         return sone;
 478                 }
 479         }
 480
 481         /**
 482          * Returns whether the given Sone is a remote Sone.
 483          *
 484          * @param sone
 485          *            The Sone to check
 486          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 487          *         otherwise
 488          */
 489         public boolean isRemoteSone(Sone sone) {
 490                 synchronized (remoteSones) {
 491                         return remoteSones.containsKey(sone.getId());
 492                 }
 493         }
 494
 495         /**
 496          * Returns whether the Sone with the given ID is a remote Sone.
 497          *
 498          * @param id
 499          *            The ID of the Sone to check
 500          * @return {@code true} if the Sone with the given ID is a remote Sone,
 501          *         {@code false} otherwise
 502          */
 503         public boolean isRemoteSone(String id) {
 504                 synchronized (remoteSones) {
 505                         return remoteSones.containsKey(id);
 506                 }
 507         }
 508
 509         /**
 510          * Returns whether the Sone with the given ID is a new Sone.
 511          *
 512          * @param soneId
 513          *            The ID of the sone to check for
 514          * @return {@code true} if the given Sone is new, false otherwise
 515          */
 516         public boolean isNewSone(String soneId) {
 517                 synchronized (newSones) {
 518                         return !knownSones.contains(soneId) && newSones.contains(soneId);
 519                 }
 520         }
 521
 522         /**
 523          * Returns whether the given Sone has been modified.
 524          *
 525          * @param sone
 526          *            The Sone to check for modifications
 527          * @return {@code true} if a modification has been detected in the Sone,
 528          *         {@code false} otherwise
 529          */
 530         public boolean isModifiedSone(Sone sone) {
 531                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 532         }
 533
 534         /**
 535          * Returns whether the target Sone is trusted by the origin Sone.
 536          *
 537          * @param origin
 538          *            The origin Sone
 539          * @param target
 540          *            The target Sone
 541          * @return {@code true} if the target Sone is trusted by the origin Sone
 542          */
 543         public boolean isSoneTrusted(Sone origin, Sone target) {
 544                 Validation.begin().isNotNull("Origin", origin).isNotNull("Target", target).check().isInstanceOf("Origin’s OwnIdentity", origin.getIdentity(), OwnIdentity.class).check();
 545                 return trustedIdentities.containsKey(origin.getIdentity()) && trustedIdentities.get(origin.getIdentity()).contains(target.getIdentity());
 546         }
 547
 548         /**
 549          * Returns the post with the given ID.
 550          *
 551          * @param postId
 552          *            The ID of the post to get
 553          * @return The post with the given ID, or a new post with the given ID
 554          */
 555         public Post getPost(String postId) {
 556                 return getPost(postId, true);
 557         }
 558
 559         /**
 560          * Returns the post with the given ID, optionally creating a new post.
 561          *
 562          * @param postId
 563          *            The ID of the post to get
 564          * @param create
 565          *            {@code true} it create a new post if no post with the given ID
 566          *            exists, {@code false} to return {@code null}
 567          * @return The post, or {@code null} if there is no such post
 568          */
 569         public Post getPost(String postId, boolean create) {
 570                 synchronized (posts) {
 571                         Post post = posts.get(postId);
 572                         if ((post == null) && create) {
 573                                 post = new Post(postId);
 574                                 posts.put(postId, post);
 575                         }
 576                         return post;
 577                 }
 578         }
 579
 580         /**
 581          * Returns whether the given post ID is new.
 582          *
 583          * @param postId
 584          *            The post ID
 585          * @return {@code true} if the post is considered to be new, {@code false}
 586          *         otherwise
 587          */
 588         public boolean isNewPost(String postId) {
 589                 synchronized (newPosts) {
 590                         return !knownPosts.contains(postId) && newPosts.contains(postId);
 591                 }
 592         }
 593
 594         /**
 595          * Returns all posts that have the given Sone as recipient.
 596          *
 597          * @see Post#getRecipient()
 598          * @param recipient
 599          *            The recipient of the posts
 600          * @return All posts that have the given Sone as recipient
 601          */
 602         public Set<Post> getDirectedPosts(Sone recipient) {
 603                 Validation.begin().isNotNull("Recipient", recipient).check();
 604                 Set<Post> directedPosts = new HashSet<Post>();
 605                 synchronized (posts) {
 606                         for (Post post : posts.values()) {
 607                                 if (recipient.equals(post.getRecipient())) {
 608                                         directedPosts.add(post);
 609                                 }
 610                         }
 611                 }
 612                 return directedPosts;
 613         }
 614
 615         /**
 616          * Returns the reply with the given ID. If there is no reply with the given
 617          * ID yet, a new one is created.
 618          *
 619          * @param replyId
 620          *            The ID of the reply to get
 621          * @return The reply
 622          */
 623         public Reply getReply(String replyId) {
 624                 return getReply(replyId, true);
 625         }
 626
 627         /**
 628          * Returns the reply with the given ID. If there is no reply with the given
 629          * ID yet, a new one is created, unless {@code create} is false in which
 630          * case {@code null} is returned.
 631          *
 632          * @param replyId
 633          *            The ID of the reply to get
 634          * @param create
 635          *            {@code true} to always return a {@link Reply}, {@code false}
 636          *            to return {@code null} if no reply can be found
 637          * @return The reply, or {@code null} if there is no such reply
 638          */
 639         public Reply getReply(String replyId, boolean create) {
 640                 synchronized (replies) {
 641                         Reply reply = replies.get(replyId);
 642                         if (create && (reply == null)) {
 643                                 reply = new Reply(replyId);
 644                                 replies.put(replyId, reply);
 645                         }
 646                         return reply;
 647                 }
 648         }
 649
 650         /**
 651          * Returns all replies for the given post, order ascending by time.
 652          *
 653          * @param post
 654          *            The post to get all replies for
 655          * @return All replies for the given post
 656          */
 657         public List<Reply> getReplies(Post post) {
 658                 Set<Sone> sones = getSones();
 659                 List<Reply> replies = new ArrayList<Reply>();
 660                 for (Sone sone : sones) {
 661                         for (Reply reply : sone.getReplies()) {
 662                                 if (reply.getPost().equals(post)) {
 663                                         replies.add(reply);
 664                                 }
 665                         }
 666                 }
 667                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 668                 return replies;
 669         }
 670
 671         /**
 672          * Returns whether the reply with the given ID is new.
 673          *
 674          * @param replyId
 675          *            The ID of the reply to check
 676          * @return {@code true} if the reply is considered to be new, {@code false}
 677          *         otherwise
 678          */
 679         public boolean isNewReply(String replyId) {
 680                 synchronized (newReplies) {
 681                         return !knownReplies.contains(replyId) && newReplies.contains(replyId);
 682                 }
 683         }
 684
 685         /**
 686          * Returns all Sones that have liked the given post.
 687          *
 688          * @param post
 689          *            The post to get the liking Sones for
 690          * @return The Sones that like the given post
 691          */
 692         public Set<Sone> getLikes(Post post) {
 693                 Set<Sone> sones = new HashSet<Sone>();
 694                 for (Sone sone : getSones()) {
 695                         if (sone.getLikedPostIds().contains(post.getId())) {
 696                                 sones.add(sone);
 697                         }
 698                 }
 699                 return sones;
 700         }
 701
 702         /**
 703          * Returns all Sones that have liked the given reply.
 704          *
 705          * @param reply
 706          *            The reply to get the liking Sones for
 707          * @return The Sones that like the given reply
 708          */
 709         public Set<Sone> getLikes(Reply reply) {
 710                 Set<Sone> sones = new HashSet<Sone>();
 711                 for (Sone sone : getSones()) {
 712                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 713                                 sones.add(sone);
 714                         }
 715                 }
 716                 return sones;
 717         }
 718
 719         /**
 720          * Returns whether the given post is bookmarked.
 721          *
 722          * @param post
 723          *            The post to check
 724          * @return {@code true} if the given post is bookmarked, {@code false}
 725          *         otherwise
 726          */
 727         public boolean isBookmarked(Post post) {
 728                 return isPostBookmarked(post.getId());
 729         }
 730
 731         /**
 732          * Returns whether the post with the given ID is bookmarked.
 733          *
 734          * @param id
 735          *            The ID of the post to check
 736          * @return {@code true} if the post with the given ID is bookmarked,
 737          *         {@code false} otherwise
 738          */
 739         public boolean isPostBookmarked(String id) {
 740                 synchronized (bookmarkedPosts) {
 741                         return bookmarkedPosts.contains(id);
 742                 }
 743         }
 744
 745         /**
 746          * Returns all currently known bookmarked posts.
 747          *
 748          * @return All bookmarked posts
 749          */
 750         public Set<Post> getBookmarkedPosts() {
 751                 Set<Post> posts = new HashSet<Post>();
 752                 synchronized (bookmarkedPosts) {
 753                         for (String bookmarkedPostId : bookmarkedPosts) {
 754                                 Post post = getPost(bookmarkedPostId, false);
 755                                 if (post != null) {
 756                                         posts.add(post);
 757                                 }
 758                         }
 759                 }
 760                 return posts;
 761         }
 762
 763         /**
 764          * Returns the album with the given ID, creating a new album if no album
 765          * with the given ID can be found.
 766          *
 767          * @param albumId
 768          *            The ID of the album
 769          * @return The album with the given ID
 770          */
 771         public Album getAlbum(String albumId) {
 772                 return getAlbum(albumId, true);
 773         }
 774
 775         /**
 776          * Returns the album with the given ID, optionally creating a new album if
 777          * an album with the given ID can not be found.
 778          *
 779          * @param albumId
 780          *            The ID of the album
 781          * @param create
 782          *            {@code true} to create a new album if none exists for the
 783          *            given ID
 784          * @return The album with the given ID, or {@code null} if no album with the
 785          *         given ID exists and {@code create} is {@code false}
 786          */
 787         public Album getAlbum(String albumId, boolean create) {
 788                 synchronized (albums) {
 789                         Album album = albums.get(albumId);
 790                         if (create && (album == null)) {
 791                                 album = new Album(albumId);
 792                                 albums.put(albumId, album);
 793                         }
 794                         return album;
 795                 }
 796         }
 797
 798         /**
 799          * Returns the image with the given ID, creating it if necessary.
 800          *
 801          * @param imageId
 802          *            The ID of the image
 803          * @return The image with the given ID
 804          */
 805         public Image getImage(String imageId) {
 806                 return getImage(imageId, true);
 807         }
 808
 809         /**
 810          * Returns the image with the given ID, optionally creating it if it does
 811          * not exist.
 812          *
 813          * @param imageId
 814          *            The ID of the image
 815          * @param create
 816          *            {@code true} to create an image if none exists with the given
 817          *            ID
 818          * @return The image with the given ID, or {@code null} if none exists and
 819          *         none was created
 820          */
 821         public Image getImage(String imageId, boolean create) {
 822                 synchronized (images) {
 823                         Image image = images.get(imageId);
 824                         if (create && (image == null)) {
 825                                 image = new Image(imageId);
 826                                 images.put(imageId, image);
 827                         }
 828                         return image;
 829                 }
 830         }
 831
 832         /**
 833          * Returns the temporary image with the given ID.
 834          *
 835          * @param imageId
 836          *            The ID of the temporary image
 837          * @return The temporary image, or {@code null} if there is no temporary
 838          *         image with the given ID
 839          */
 840         public TemporaryImage getTemporaryImage(String imageId) {
 841                 synchronized (temporaryImages) {
 842                         return temporaryImages.get(imageId);
 843                 }
 844         }
 845
 846         //
 847         // ACTIONS
 848         //
 849
 850         /**
 851          * Locks the given Sone. A locked Sone will not be inserted by
 852          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 853          * again.
 854          *
 855          * @param sone
 856          *            The sone to lock
 857          */
 858         public void lockSone(Sone sone) {
 859                 synchronized (lockedSones) {
 860                         if (lockedSones.add(sone)) {
 861                                 coreListenerManager.fireSoneLocked(sone);
 862                         }
 863                 }
 864         }
 865
 866         /**
 867          * Unlocks the given Sone.
 868          *
 869          * @see #lockSone(Sone)
 870          * @param sone
 871          *            The sone to unlock
 872          */
 873         public void unlockSone(Sone sone) {
 874                 synchronized (lockedSones) {
 875                         if (lockedSones.remove(sone)) {
 876                                 coreListenerManager.fireSoneUnlocked(sone);
 877                         }
 878                 }
 879         }
 880
 881         /**
 882          * Adds a local Sone from the given ID which has to be the ID of an own
 883          * identity.
 884          *
 885          * @param id
 886          *            The ID of an own identity to add a Sone for
 887          * @return The added (or already existing) Sone
 888          */
 889         public Sone addLocalSone(String id) {
 890                 synchronized (localSones) {
 891                         if (localSones.containsKey(id)) {
 892                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 893                                 return localSones.get(id);
 894                         }
 895                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 896                         if (ownIdentity == null) {
 897                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 898                                 return null;
 899                         }
 900                         return addLocalSone(ownIdentity);
 901                 }
 902         }
 903
 904         /**
 905          * Adds a local Sone from the given own identity.
 906          *
 907          * @param ownIdentity
 908          *            The own identity to create a Sone from
 909          * @return The added (or already existing) Sone
 910          */
 911         public Sone addLocalSone(OwnIdentity ownIdentity) {
 912                 if (ownIdentity == null) {
 913                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 914                         return null;
 915                 }
 916                 synchronized (localSones) {
 917                         final Sone sone;
 918                         try {
 919                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 920                         } catch (MalformedURLException mue1) {
 921                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 922                                 return null;
 923                         }
 924                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 925                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 926                         /* TODO - load posts ’n stuff */
 927                         localSones.put(ownIdentity.getId(), sone);
 928                         final SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 929                         soneInserters.put(sone, soneInserter);
 930                         setSoneStatus(sone, SoneStatus.idle);
 931                         loadSone(sone);
 932                         if (!preferences.isSoneRescueMode()) {
 933                                 soneInserter.start();
 934                         }
 935                         new Thread(new Runnable() {
 936
 937                                 @Override
 938                                 @SuppressWarnings("synthetic-access")
 939                                 public void run() {
 940                                         if (!preferences.isSoneRescueMode()) {
 941                                                 return;
 942                                         }
 943                                         logger.log(Level.INFO, "Trying to restore Sone from Freenet…");
 944                                         coreListenerManager.fireRescuingSone(sone);
 945                                         lockSone(sone);
 946                                         long edition = sone.getLatestEdition();
 947                                         while (!stopped && (edition >= 0) && preferences.isSoneRescueMode()) {
 948                                                 logger.log(Level.FINE, "Downloading edition " + edition + "…");
 949                                                 soneDownloader.fetchSone(sone, sone.getRequestUri().setKeyType("SSK").setDocName("Sone-" + edition));
 950                                                 --edition;
 951                                         }
 952                                         logger.log(Level.INFO, "Finished restoring Sone from Freenet, starting Inserter…");
 953                                         saveSone(sone);
 954                                         coreListenerManager.fireRescuedSone(sone);
 955                                         soneInserter.start();
 956                                 }
 957
 958                         }, "Sone Downloader").start();
 959                         return sone;
 960                 }
 961         }
 962
 963         /**
 964          * Creates a new Sone for the given own identity.
 965          *
 966          * @param ownIdentity
 967          *            The own identity to create a Sone for
 968          * @return The created Sone
 969          */
 970         public Sone createSone(OwnIdentity ownIdentity) {
 971                 try {
 972                         ownIdentity.addContext("Sone");
 973                 } catch (WebOfTrustException wote1) {
 974                         logger.log(Level.SEVERE, "Could not add “Sone” context to own identity: " + ownIdentity, wote1);
 975                         return null;
 976                 }
 977                 Sone sone = addLocalSone(ownIdentity);
 978                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
 979                 saveSone(sone);
 980                 return sone;
 981         }
 982
 983         /**
 984          * Adds the Sone of the given identity.
 985          *
 986          * @param identity
 987          *            The identity whose Sone to add
 988          * @return The added or already existing Sone
 989          */
 990         public Sone addRemoteSone(Identity identity) {
 991                 if (identity == null) {
 992                         logger.log(Level.WARNING, "Given Identity is null!");
 993                         return null;
 994                 }
 995                 synchronized (remoteSones) {
 996                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 997                         boolean newSone = sone.getRequestUri() == null;
 998                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 999                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
1000                         if (newSone) {
1001                                 synchronized (newSones) {
1002                                         newSone = !knownSones.contains(sone.getId());
1003                                         if (newSone) {
1004                                                 newSones.add(sone.getId());
1005                                         }
1006                                 }
1007                                 if (newSone) {
1008                                         coreListenerManager.fireNewSoneFound(sone);
1009                                         for (Sone localSone : getLocalSones()) {
1010                                                 if (localSone.getOptions().getBooleanOption("AutoFollow").get()) {
1011                                                         localSone.addFriend(sone.getId());
1012                                                 }
1013                                         }
1014                                 }
1015                         }
1016                         remoteSones.put(identity.getId(), sone);
1017                         soneDownloader.addSone(sone);
1018                         setSoneStatus(sone, SoneStatus.unknown);
1019                         new Thread(new Runnable() {
1020
1021                                 @Override
1022                                 @SuppressWarnings("synthetic-access")
1023                                 public void run() {
1024                                         soneDownloader.fetchSone(sone);
1025                                 }
1026
1027                         }, "Sone Downloader").start();
1028                         return sone;
1029                 }
1030         }
1031
1032         /**
1033          * Retrieves the trust relationship from the origin to the target. If the
1034          * trust relationship can not be retrieved, {@code null} is returned.
1035          *
1036          * @see Identity#getTrust(OwnIdentity)
1037          * @param origin
1038          *            The origin of the trust tree
1039          * @param target
1040          *            The target of the trust
1041          * @return The trust relationship
1042          */
1043         public Trust getTrust(Sone origin, Sone target) {
1044                 if (!isLocalSone(origin)) {
1045                         logger.log(Level.WARNING, "Tried to get trust from remote Sone: %s", origin);
1046                         return null;
1047                 }
1048                 return target.getIdentity().getTrust((OwnIdentity) origin.getIdentity());
1049         }
1050
1051         /**
1052          * Sets the trust value of the given origin Sone for the target Sone.
1053          *
1054          * @param origin
1055          *            The origin Sone
1056          * @param target
1057          *            The target Sone
1058          * @param trustValue
1059          *            The trust value (from {@code -100} to {@code 100})
1060          */
1061         public void setTrust(Sone origin, Sone target, int trustValue) {
1062                 Validation.begin().isNotNull("Trust Origin", origin).check().isInstanceOf("Trust Origin", origin.getIdentity(), OwnIdentity.class).isNotNull("Trust Target", target).isLessOrEqual("Trust Value", trustValue, 100).isGreaterOrEqual("Trust Value", trustValue, -100).check();
1063                 try {
1064                         ((OwnIdentity) origin.getIdentity()).setTrust(target.getIdentity(), trustValue, preferences.getTrustComment());
1065                 } catch (WebOfTrustException wote1) {
1066                         logger.log(Level.WARNING, "Could not set trust for Sone: " + target, wote1);
1067                 }
1068         }
1069
1070         /**
1071          * Removes any trust assignment for the given target Sone.
1072          *
1073          * @param origin
1074          *            The trust origin
1075          * @param target
1076          *            The trust target
1077          */
1078         public void removeTrust(Sone origin, Sone target) {
1079                 Validation.begin().isNotNull("Trust Origin", origin).isNotNull("Trust Target", target).check().isInstanceOf("Trust Origin Identity", origin.getIdentity(), OwnIdentity.class).check();
1080                 try {
1081                         ((OwnIdentity) origin.getIdentity()).removeTrust(target.getIdentity());
1082                 } catch (WebOfTrustException wote1) {
1083                         logger.log(Level.WARNING, "Could not remove trust for Sone: " + target, wote1);
1084                 }
1085         }
1086
1087         /**
1088          * Assigns the configured positive trust value for the given target.
1089          *
1090          * @param origin
1091          *            The trust origin
1092          * @param target
1093          *            The trust target
1094          */
1095         public void trustSone(Sone origin, Sone target) {
1096                 setTrust(origin, target, preferences.getPositiveTrust());
1097         }
1098
1099         /**
1100          * Assigns the configured negative trust value for the given target.
1101          *
1102          * @param origin
1103          *            The trust origin
1104          * @param target
1105          *            The trust target
1106          */
1107         public void distrustSone(Sone origin, Sone target) {
1108                 setTrust(origin, target, preferences.getNegativeTrust());
1109         }
1110
1111         /**
1112          * Removes the trust assignment for the given target.
1113          *
1114          * @param origin
1115          *            The trust origin
1116          * @param target
1117          *            The trust target
1118          */
1119         public void untrustSone(Sone origin, Sone target) {
1120                 removeTrust(origin, target);
1121         }
1122
1123         /**
1124          * Updates the stores Sone with the given Sone.
1125          *
1126          * @param sone
1127          *            The updated Sone
1128          */
1129         public void updateSone(Sone sone) {
1130                 if (hasSone(sone.getId())) {
1131                         boolean soneRescueMode = isLocalSone(sone) && preferences.isSoneRescueMode();
1132                         Sone storedSone = getSone(sone.getId());
1133                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
1134                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
1135                                 return;
1136                         }
1137                         synchronized (posts) {
1138                                 if (!soneRescueMode) {
1139                                         for (Post post : storedSone.getPosts()) {
1140                                                 posts.remove(post.getId());
1141                                                 if (!sone.getPosts().contains(post)) {
1142                                                         coreListenerManager.firePostRemoved(post);
1143                                                 }
1144                                         }
1145                                 }
1146                                 List<Post> storedPosts = storedSone.getPosts();
1147                                 synchronized (newPosts) {
1148                                         for (Post post : sone.getPosts()) {
1149                                                 post.setSone(storedSone);
1150                                                 if (!storedPosts.contains(post) && !knownPosts.contains(post.getId())) {
1151                                                         newPosts.add(post.getId());
1152                                                         coreListenerManager.fireNewPostFound(post);
1153                                                 }
1154                                                 posts.put(post.getId(), post);
1155                                         }
1156                                 }
1157                         }
1158                         synchronized (replies) {
1159                                 if (!soneRescueMode) {
1160                                         for (Reply reply : storedSone.getReplies()) {
1161                                                 replies.remove(reply.getId());
1162                                                 if (!sone.getReplies().contains(reply)) {
1163                                                         coreListenerManager.fireReplyRemoved(reply);
1164                                                 }
1165                                         }
1166                                 }
1167                                 Set<Reply> storedReplies = storedSone.getReplies();
1168                                 synchronized (newReplies) {
1169                                         for (Reply reply : sone.getReplies()) {
1170                                                 reply.setSone(storedSone);
1171                                                 if (!storedReplies.contains(reply) && !knownReplies.contains(reply.getId())) {
1172                                                         newReplies.add(reply.getId());
1173                                                         coreListenerManager.fireNewReplyFound(reply);
1174                                                 }
1175                                                 replies.put(reply.getId(), reply);
1176                                         }
1177                                 }
1178                         }
1179                         synchronized (storedSone) {
1180                                 if (!soneRescueMode || (sone.getTime() > storedSone.getTime())) {
1181                                         storedSone.setTime(sone.getTime());
1182                                 }
1183                                 storedSone.setClient(sone.getClient());
1184                                 storedSone.setProfile(sone.getProfile());
1185                                 if (soneRescueMode) {
1186                                         for (Post post : sone.getPosts()) {
1187                                                 storedSone.addPost(post);
1188                                         }
1189                                         for (Reply reply : sone.getReplies()) {
1190                                                 storedSone.addReply(reply);
1191                                         }
1192                                         for (String likedPostId : sone.getLikedPostIds()) {
1193                                                 storedSone.addLikedPostId(likedPostId);
1194                                         }
1195                                         for (String likedReplyId : sone.getLikedReplyIds()) {
1196                                                 storedSone.addLikedReplyId(likedReplyId);
1197                                         }
1198                                 } else {
1199                                         storedSone.setPosts(sone.getPosts());
1200                                         storedSone.setReplies(sone.getReplies());
1201                                         storedSone.setLikePostIds(sone.getLikedPostIds());
1202                                         storedSone.setLikeReplyIds(sone.getLikedReplyIds());
1203                                         storedSone.setAlbums(sone.getAlbums());
1204                                 }
1205                                 storedSone.setLatestEdition(sone.getLatestEdition());
1206                         }
1207                 }
1208         }
1209
1210         /**
1211          * Deletes the given Sone. This will remove the Sone from the
1212          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
1213          * and remove the context from its identity.
1214          *
1215          * @param sone
1216          *            The Sone to delete
1217          */
1218         public void deleteSone(Sone sone) {
1219                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1220                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
1221                         return;
1222                 }
1223                 synchronized (localSones) {
1224                         if (!localSones.containsKey(sone.getId())) {
1225                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
1226                                 return;
1227                         }
1228                         localSones.remove(sone.getId());
1229                         soneInserters.remove(sone).stop();
1230                 }
1231                 try {
1232                         ((OwnIdentity) sone.getIdentity()).removeContext("Sone");
1233                         ((OwnIdentity) sone.getIdentity()).removeProperty("Sone.LatestEdition");
1234                 } catch (WebOfTrustException wote1) {
1235                         logger.log(Level.WARNING, "Could not remove context and properties from Sone: " + sone, wote1);
1236                 }
1237                 try {
1238                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1239                 } catch (ConfigurationException ce1) {
1240                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1241                 }
1242         }
1243
1244         /**
1245          * Marks the given Sone as known. If the Sone was {@link #isNewPost(String)
1246          * new} before, a {@link CoreListener#markSoneKnown(Sone)} event is fired.
1247          *
1248          * @param sone
1249          *            The Sone to mark as known
1250          */
1251         public void markSoneKnown(Sone sone) {
1252                 synchronized (newSones) {
1253                         if (newSones.remove(sone.getId())) {
1254                                 knownSones.add(sone.getId());
1255                                 coreListenerManager.fireMarkSoneKnown(sone);
1256                                 saveConfiguration();
1257                         }
1258                 }
1259         }
1260
1261         /**
1262          * Loads and updates the given Sone from the configuration. If any error is
1263          * encountered, loading is aborted and the given Sone is not changed.
1264          *
1265          * @param sone
1266          *            The Sone to load and update
1267          */
1268         public void loadSone(Sone sone) {
1269                 if (!isLocalSone(sone)) {
1270                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
1271                         return;
1272                 }
1273
1274                 /* load Sone. */
1275                 String sonePrefix = "Sone/" + sone.getId();
1276                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1277                 if (soneTime == null) {
1278                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1279                         return;
1280                 }
1281                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1282
1283                 /* load profile. */
1284                 Profile profile = new Profile();
1285                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1286                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1287                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1288                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1289                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1290                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1291
1292                 /* load profile fields. */
1293                 while (true) {
1294                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1295                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1296                         if (fieldName == null) {
1297                                 break;
1298                         }
1299                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1300                         profile.addField(fieldName).setValue(fieldValue);
1301                 }
1302
1303                 /* load posts. */
1304                 Set<Post> posts = new HashSet<Post>();
1305                 while (true) {
1306                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1307                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1308                         if (postId == null) {
1309                                 break;
1310                         }
1311                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1312                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1313                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1314                         if ((postTime == 0) || (postText == null)) {
1315                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1316                                 return;
1317                         }
1318                         Post post = getPost(postId).setSone(sone).setTime(postTime).setText(postText);
1319                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1320                                 post.setRecipient(getSone(postRecipientId));
1321                         }
1322                         posts.add(post);
1323                 }
1324
1325                 /* load replies. */
1326                 Set<Reply> replies = new HashSet<Reply>();
1327                 while (true) {
1328                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1329                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1330                         if (replyId == null) {
1331                                 break;
1332                         }
1333                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1334                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1335                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1336                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1337                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1338                                 return;
1339                         }
1340                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
1341                 }
1342
1343                 /* load post likes. */
1344                 Set<String> likedPostIds = new HashSet<String>();
1345                 while (true) {
1346                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1347                         if (likedPostId == null) {
1348                                 break;
1349                         }
1350                         likedPostIds.add(likedPostId);
1351                 }
1352
1353                 /* load reply likes. */
1354                 Set<String> likedReplyIds = new HashSet<String>();
1355                 while (true) {
1356                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1357                         if (likedReplyId == null) {
1358                                 break;
1359                         }
1360                         likedReplyIds.add(likedReplyId);
1361                 }
1362
1363                 /* load friends. */
1364                 Set<String> friends = new HashSet<String>();
1365                 while (true) {
1366                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1367                         if (friendId == null) {
1368                                 break;
1369                         }
1370                         friends.add(friendId);
1371                 }
1372
1373                 /* load albums. */
1374                 List<Album> topLevelAlbums = new ArrayList<Album>();
1375                 int albumCounter = 0;
1376                 while (true) {
1377                         String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1378                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1379                         if (albumId == null) {
1380                                 break;
1381                         }
1382                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1383                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1384                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1385                         if ((albumTitle == null) || (albumDescription == null)) {
1386                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1387                                 return;
1388                         }
1389                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription);
1390                         if (albumParentId != null) {
1391                                 Album parentAlbum = getAlbum(albumParentId, false);
1392                                 if (parentAlbum == null) {
1393                                         logger.log(Level.WARNING, "Invalid parent album ID: " + albumParentId);
1394                                         return;
1395                                 }
1396                                 parentAlbum.addAlbum(album);
1397                         } else {
1398                                 topLevelAlbums.add(album);
1399                         }
1400                 }
1401
1402                 /* load images. */
1403                 int imageCounter = 0;
1404                 while (true) {
1405                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1406                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1407                         if (imageId == null) {
1408                                 break;
1409                         }
1410                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1411                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1412                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1413                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1414                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1415                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1416                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1417                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1418                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1419                                 return;
1420                         }
1421                         Album album = getAlbum(albumId, false);
1422                         if (album == null) {
1423                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1424                                 return;
1425                         }
1426                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1427                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1428                         album.addImage(image);
1429                 }
1430
1431                 /* load options. */
1432                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1433                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1434
1435                 /* if we’re still here, Sone was loaded successfully. */
1436                 synchronized (sone) {
1437                         sone.setTime(soneTime);
1438                         sone.setProfile(profile);
1439                         sone.setPosts(posts);
1440                         sone.setReplies(replies);
1441                         sone.setLikePostIds(likedPostIds);
1442                         sone.setLikeReplyIds(likedReplyIds);
1443                         sone.setFriends(friends);
1444                         sone.setAlbums(topLevelAlbums);
1445                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1446                 }
1447                 synchronized (newSones) {
1448                         for (String friend : friends) {
1449                                 knownSones.add(friend);
1450                         }
1451                 }
1452                 synchronized (newPosts) {
1453                         for (Post post : posts) {
1454                                 knownPosts.add(post.getId());
1455                         }
1456                 }
1457                 synchronized (newReplies) {
1458                         for (Reply reply : replies) {
1459                                 knownReplies.add(reply.getId());
1460                         }
1461                 }
1462         }
1463
1464         /**
1465          * Saves the given Sone. This will persist all local settings for the given
1466          * Sone, such as the friends list and similar, private options.
1467          *
1468          * @param sone
1469          *            The Sone to save
1470          */
1471         public synchronized void saveSone(Sone sone) {
1472                 if (!isLocalSone(sone)) {
1473                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
1474                         return;
1475                 }
1476                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1477                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
1478                         return;
1479                 }
1480
1481                 logger.log(Level.INFO, "Saving Sone: %s", sone);
1482                 try {
1483                         ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1484
1485                         /* save Sone into configuration. */
1486                         String sonePrefix = "Sone/" + sone.getId();
1487                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1488                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1489
1490                         /* save profile. */
1491                         Profile profile = sone.getProfile();
1492                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1493                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1494                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1495                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1496                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1497                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1498
1499                         /* save profile fields. */
1500                         int fieldCounter = 0;
1501                         for (Field profileField : profile.getFields()) {
1502                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1503                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1504                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1505                         }
1506                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1507
1508                         /* save posts. */
1509                         int postCounter = 0;
1510                         for (Post post : sone.getPosts()) {
1511                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1512                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1513                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1514                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1515                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1516                         }
1517                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1518
1519                         /* save replies. */
1520                         int replyCounter = 0;
1521                         for (Reply reply : sone.getReplies()) {
1522                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1523                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1524                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
1525                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1526                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1527                         }
1528                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1529
1530                         /* save post likes. */
1531                         int postLikeCounter = 0;
1532                         for (String postId : sone.getLikedPostIds()) {
1533                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1534                         }
1535                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1536
1537                         /* save reply likes. */
1538                         int replyLikeCounter = 0;
1539                         for (String replyId : sone.getLikedReplyIds()) {
1540                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1541                         }
1542                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1543
1544                         /* save friends. */
1545                         int friendCounter = 0;
1546                         for (String friendId : sone.getFriends()) {
1547                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1548                         }
1549                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1550
1551                         /* save albums. first, collect in a flat structure, top-level first. */
1552                         List<Album> albums = Sone.flattenAlbums(sone.getAlbums());
1553
1554                         int albumCounter = 0;
1555                         for (Album album : albums) {
1556                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1557                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1558                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1559                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1560                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
1561                         }
1562                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1563
1564                         /* save images. */
1565                         int imageCounter = 0;
1566                         for (Album album : albums) {
1567                                 for (Image image : album.getImages()) {
1568                                         if (!image.isInserted()) {
1569                                                 continue;
1570                                         }
1571                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1572                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1573                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1574                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1575                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1576                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1577                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1578                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1579                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1580                                 }
1581                         }
1582                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1583
1584                         /* save options. */
1585                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1586
1587                         configuration.save();
1588                         logger.log(Level.INFO, "Sone %s saved.", sone);
1589                 } catch (ConfigurationException ce1) {
1590                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
1591                 } catch (WebOfTrustException wote1) {
1592                         logger.log(Level.WARNING, "Could not set WoT property for Sone: " + sone, wote1);
1593                 }
1594         }
1595
1596         /**
1597          * Creates a new post.
1598          *
1599          * @param sone
1600          *            The Sone that creates the post
1601          * @param text
1602          *            The text of the post
1603          * @return The created post
1604          */
1605         public Post createPost(Sone sone, String text) {
1606                 return createPost(sone, System.currentTimeMillis(), text);
1607         }
1608
1609         /**
1610          * Creates a new post.
1611          *
1612          * @param sone
1613          *            The Sone that creates the post
1614          * @param time
1615          *            The time of the post
1616          * @param text
1617          *            The text of the post
1618          * @return The created post
1619          */
1620         public Post createPost(Sone sone, long time, String text) {
1621                 return createPost(sone, null, time, text);
1622         }
1623
1624         /**
1625          * Creates a new post.
1626          *
1627          * @param sone
1628          *            The Sone that creates the post
1629          * @param recipient
1630          *            The recipient Sone, or {@code null} if this post does not have
1631          *            a recipient
1632          * @param text
1633          *            The text of the post
1634          * @return The created post
1635          */
1636         public Post createPost(Sone sone, Sone recipient, String text) {
1637                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1638         }
1639
1640         /**
1641          * Creates a new post.
1642          *
1643          * @param sone
1644          *            The Sone that creates the post
1645          * @param recipient
1646          *            The recipient Sone, or {@code null} if this post does not have
1647          *            a recipient
1648          * @param time
1649          *            The time of the post
1650          * @param text
1651          *            The text of the post
1652          * @return The created post
1653          */
1654         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1655                 if (!isLocalSone(sone)) {
1656                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
1657                         return null;
1658                 }
1659                 Post post = new Post(sone, time, text);
1660                 if (recipient != null) {
1661                         post.setRecipient(recipient);
1662                 }
1663                 synchronized (posts) {
1664                         posts.put(post.getId(), post);
1665                 }
1666                 synchronized (newPosts) {
1667                         newPosts.add(post.getId());
1668                         coreListenerManager.fireNewPostFound(post);
1669                 }
1670                 sone.addPost(post);
1671                 saveSone(sone);
1672                 return post;
1673         }
1674
1675         /**
1676          * Deletes the given post.
1677          *
1678          * @param post
1679          *            The post to delete
1680          */
1681         public void deletePost(Post post) {
1682                 if (!isLocalSone(post.getSone())) {
1683                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
1684                         return;
1685                 }
1686                 post.getSone().removePost(post);
1687                 synchronized (posts) {
1688                         posts.remove(post.getId());
1689                 }
1690                 synchronized (newPosts) {
1691                         markPostKnown(post);
1692                         knownPosts.remove(post.getId());
1693                 }
1694                 saveSone(post.getSone());
1695         }
1696
1697         /**
1698          * Marks the given post as known, if it is currently a new post (according
1699          * to {@link #isNewPost(String)}).
1700          *
1701          * @param post
1702          *            The post to mark as known
1703          */
1704         public void markPostKnown(Post post) {
1705                 synchronized (newPosts) {
1706                         if (newPosts.remove(post.getId())) {
1707                                 knownPosts.add(post.getId());
1708                                 coreListenerManager.fireMarkPostKnown(post);
1709                                 saveConfiguration();
1710                         }
1711                 }
1712         }
1713
1714         /**
1715          * Bookmarks the given post.
1716          *
1717          * @param post
1718          *            The post to bookmark
1719          */
1720         public void bookmark(Post post) {
1721                 bookmarkPost(post.getId());
1722         }
1723
1724         /**
1725          * Bookmarks the post with the given ID.
1726          *
1727          * @param id
1728          *            The ID of the post to bookmark
1729          */
1730         public void bookmarkPost(String id) {
1731                 synchronized (bookmarkedPosts) {
1732                         bookmarkedPosts.add(id);
1733                 }
1734         }
1735
1736         /**
1737          * Removes the given post from the bookmarks.
1738          *
1739          * @param post
1740          *            The post to unbookmark
1741          */
1742         public void unbookmark(Post post) {
1743                 unbookmarkPost(post.getId());
1744         }
1745
1746         /**
1747          * Removes the post with the given ID from the bookmarks.
1748          *
1749          * @param id
1750          *            The ID of the post to unbookmark
1751          */
1752         public void unbookmarkPost(String id) {
1753                 synchronized (bookmarkedPosts) {
1754                         bookmarkedPosts.remove(id);
1755                 }
1756         }
1757
1758         /**
1759          * Creates a new reply.
1760          *
1761          * @param sone
1762          *            The Sone that creates the reply
1763          * @param post
1764          *            The post that this reply refers to
1765          * @param text
1766          *            The text of the reply
1767          * @return The created reply
1768          */
1769         public Reply createReply(Sone sone, Post post, String text) {
1770                 return createReply(sone, post, System.currentTimeMillis(), text);
1771         }
1772
1773         /**
1774          * Creates a new reply.
1775          *
1776          * @param sone
1777          *            The Sone that creates the reply
1778          * @param post
1779          *            The post that this reply refers to
1780          * @param time
1781          *            The time of the reply
1782          * @param text
1783          *            The text of the reply
1784          * @return The created reply
1785          */
1786         public Reply createReply(Sone sone, Post post, long time, String text) {
1787                 if (!isLocalSone(sone)) {
1788                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
1789                         return null;
1790                 }
1791                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
1792                 synchronized (replies) {
1793                         replies.put(reply.getId(), reply);
1794                 }
1795                 synchronized (newReplies) {
1796                         newReplies.add(reply.getId());
1797                         coreListenerManager.fireNewReplyFound(reply);
1798                 }
1799                 sone.addReply(reply);
1800                 saveSone(sone);
1801                 return reply;
1802         }
1803
1804         /**
1805          * Deletes the given reply.
1806          *
1807          * @param reply
1808          *            The reply to delete
1809          */
1810         public void deleteReply(Reply reply) {
1811                 Sone sone = reply.getSone();
1812                 if (!isLocalSone(sone)) {
1813                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
1814                         return;
1815                 }
1816                 synchronized (replies) {
1817                         replies.remove(reply.getId());
1818                 }
1819                 synchronized (newReplies) {
1820                         markReplyKnown(reply);
1821                         knownReplies.remove(reply.getId());
1822                 }
1823                 sone.removeReply(reply);
1824                 saveSone(sone);
1825         }
1826
1827         /**
1828          * Marks the given reply as known, if it is currently a new reply (according
1829          * to {@link #isNewReply(String)}).
1830          *
1831          * @param reply
1832          *            The reply to mark as known
1833          */
1834         public void markReplyKnown(Reply reply) {
1835                 synchronized (newReplies) {
1836                         if (newReplies.remove(reply.getId())) {
1837                                 knownReplies.add(reply.getId());
1838                                 coreListenerManager.fireMarkReplyKnown(reply);
1839                                 saveConfiguration();
1840                         }
1841                 }
1842         }
1843
1844         /**
1845          * Creates a new top-level album for the given Sone.
1846          *
1847          * @param sone
1848          *            The Sone to create the album for
1849          * @return The new album
1850          */
1851         public Album createAlbum(Sone sone) {
1852                 return createAlbum(sone, null);
1853         }
1854
1855         /**
1856          * Creates a new album for the given Sone.
1857          *
1858          * @param sone
1859          *            The Sone to create the album for
1860          * @param parent
1861          *            The parent of the album (may be {@code null} to create a
1862          *            top-level album)
1863          * @return The new album
1864          */
1865         public Album createAlbum(Sone sone, Album parent) {
1866                 Album album = new Album();
1867                 synchronized (albums) {
1868                         albums.put(album.getId(), album);
1869                 }
1870                 album.setSone(sone);
1871                 if (parent != null) {
1872                         parent.addAlbum(album);
1873                 } else {
1874                         sone.addAlbum(album);
1875                 }
1876                 return album;
1877         }
1878
1879         /**
1880          * Deletes the given album. The owner of the album has to be a local Sone,
1881          * and the album has to be {@link Album#isEmpty() empty} to be deleted.
1882          *
1883          * @param album
1884          *            The album to remove
1885          */
1886         public void deleteAlbum(Album album) {
1887                 Validation.begin().isNotNull("Album", album).check().is("Local Sone", isLocalSone(album.getSone())).check();
1888                 if (!album.isEmpty()) {
1889                         return;
1890                 }
1891                 if (album.getParent() == null) {
1892                         album.getSone().removeAlbum(album);
1893                 } else {
1894                         album.getParent().removeAlbum(album);
1895                 }
1896                 synchronized (albums) {
1897                         albums.remove(album.getId());
1898                 }
1899                 saveSone(album.getSone());
1900         }
1901
1902         /**
1903          * Creates a new image.
1904          *
1905          * @param sone
1906          *            The Sone creating the image
1907          * @param album
1908          *            The album the image will be inserted into
1909          * @param temporaryImage
1910          *            The temporary image to create the image from
1911          * @return The newly created image
1912          */
1913         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1914                 Validation.begin().isNotNull("Sone", sone).isNotNull("Album", album).isNotNull("Temporary Image", temporaryImage).check().is("Local Sone", isLocalSone(sone)).check().isEqual("Owner and Album Owner", sone, album.getSone()).check();
1915                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1916                 album.addImage(image);
1917                 synchronized (images) {
1918                         images.put(image.getId(), image);
1919                 }
1920                 imageInserter.insertImage(temporaryImage, image);
1921                 return image;
1922         }
1923
1924         /**
1925          * Deletes the given image. This method will also delete a matching
1926          * temporary image.
1927          *
1928          * @see #deleteTemporaryImage(TemporaryImage)
1929          * @param image
1930          *            The image to delete
1931          */
1932         public void deleteImage(Image image) {
1933                 Validation.begin().isNotNull("Image", image).check().is("Local Sone", isLocalSone(image.getSone())).check();
1934                 deleteTemporaryImage(image.getId());
1935                 image.getAlbum().removeImage(image);
1936                 synchronized (images) {
1937                         images.remove(image.getId());
1938                 }
1939                 saveSone(image.getSone());
1940         }
1941
1942         /**
1943          * Creates a new temporary image.
1944          *
1945          * @param mimeType
1946          *            The MIME type of the temporary image
1947          * @param imageData
1948          *            The encoded data of the image
1949          * @return The temporary image
1950          */
1951         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1952                 TemporaryImage temporaryImage = new TemporaryImage();
1953                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1954                 synchronized (temporaryImages) {
1955                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1956                 }
1957                 return temporaryImage;
1958         }
1959
1960         /**
1961          * Deletes the given temporary image.
1962          *
1963          * @param temporaryImage
1964          *            The temporary image to delete
1965          */
1966         public void deleteTemporaryImage(TemporaryImage temporaryImage) {
1967                 Validation.begin().isNotNull("Temporary Image", temporaryImage).check();
1968                 deleteTemporaryImage(temporaryImage.getId());
1969         }
1970
1971         /**
1972          * Deletes the temporary image with the given ID.
1973          *
1974          * @param imageId
1975          *            The ID of the temporary image to delete
1976          */
1977         public void deleteTemporaryImage(String imageId) {
1978                 Validation.begin().isNotNull("Temporary Image ID", imageId).check();
1979                 synchronized (temporaryImages) {
1980                         temporaryImages.remove(imageId);
1981                 }
1982                 Image image = getImage(imageId, false);
1983                 if (image != null) {
1984                         imageInserter.cancelImageInsert(image);
1985                 }
1986         }
1987
1988         /**
1989          * Starts the core.
1990          */
1991         public void start() {
1992                 loadConfiguration();
1993                 updateChecker.addUpdateListener(this);
1994                 updateChecker.start();
1995         }
1996
1997         /**
1998          * Stops the core.
1999          */
2000         public void stop() {
2001                 synchronized (localSones) {
2002                         for (SoneInserter soneInserter : soneInserters.values()) {
2003                                 soneInserter.stop();
2004                         }
2005                 }
2006                 updateChecker.stop();
2007                 updateChecker.removeUpdateListener(this);
2008                 soneDownloader.stop();
2009                 saveConfiguration();
2010                 stopped = true;
2011         }
2012
2013         /**
2014          * Saves the current options.
2015          */
2016         public void saveConfiguration() {
2017                 synchronized (configuration) {
2018                         if (storingConfiguration) {
2019                                 logger.log(Level.FINE, "Already storing configuration…");
2020                                 return;
2021                         }
2022                         storingConfiguration = true;
2023                 }
2024
2025                 /* store the options first. */
2026                 try {
2027                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
2028                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
2029                         configuration.getIntValue("Option/PostsPerPage").setValue(options.getIntegerOption("PostsPerPage").getReal());
2030                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
2031                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
2032                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
2033                         configuration.getBooleanValue("Option/SoneRescueMode").setValue(options.getBooleanOption("SoneRescueMode").getReal());
2034                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
2035                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
2036
2037                         /* save known Sones. */
2038                         int soneCounter = 0;
2039                         synchronized (newSones) {
2040                                 for (String knownSoneId : knownSones) {
2041                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
2042                                 }
2043                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
2044                         }
2045
2046                         /* save known posts. */
2047                         int postCounter = 0;
2048                         synchronized (newPosts) {
2049                                 for (String knownPostId : knownPosts) {
2050                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
2051                                 }
2052                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
2053                         }
2054
2055                         /* save known replies. */
2056                         int replyCounter = 0;
2057                         synchronized (newReplies) {
2058                                 for (String knownReplyId : knownReplies) {
2059                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
2060                                 }
2061                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
2062                         }
2063
2064                         /* save bookmarked posts. */
2065                         int bookmarkedPostCounter = 0;
2066                         synchronized (bookmarkedPosts) {
2067                                 for (String bookmarkedPostId : bookmarkedPosts) {
2068                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
2069                                 }
2070                         }
2071                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
2072
2073                         /* now save it. */
2074                         configuration.save();
2075
2076                 } catch (ConfigurationException ce1) {
2077                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2078                 } finally {
2079                         synchronized (configuration) {
2080                                 storingConfiguration = false;
2081                         }
2082                 }
2083         }
2084
2085         //
2086         // PRIVATE METHODS
2087         //
2088
2089         /**
2090          * Loads the configuration.
2091          */
2092         @SuppressWarnings("unchecked")
2093         private void loadConfiguration() {
2094                 /* create options. */
2095                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
2096
2097                         @Override
2098                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2099                                 SoneInserter.setInsertionDelay(newValue);
2100                         }
2101
2102                 }));
2103                 options.addIntegerOption("PostsPerPage", new DefaultOption<Integer>(10));
2104                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75));
2105                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-25));
2106                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2107                 options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
2108                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
2109                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
2110
2111                 /* read options from configuration. */
2112                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
2113                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
2114                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
2115                 options.getBooleanOption("ClearOnNextRestart").set(null);
2116                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
2117                 if (clearConfiguration) {
2118                         /* stop loading the configuration. */
2119                         return;
2120                 }
2121
2122                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
2123                 options.getIntegerOption("PostsPerPage").set(configuration.getIntValue("Option/PostsPerPage").getValue(null));
2124                 options.getIntegerOption("PositiveTrust").set(configuration.getIntValue("Option/PositiveTrust").getValue(null));
2125                 options.getIntegerOption("NegativeTrust").set(configuration.getIntValue("Option/NegativeTrust").getValue(null));
2126                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2127                 options.getBooleanOption("SoneRescueMode").set(configuration.getBooleanValue("Option/SoneRescueMode").getValue(null));
2128
2129                 /* load known Sones. */
2130                 int soneCounter = 0;
2131                 while (true) {
2132                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2133                         if (knownSoneId == null) {
2134                                 break;
2135                         }
2136                         synchronized (newSones) {
2137                                 knownSones.add(knownSoneId);
2138                         }
2139                 }
2140
2141                 /* load known posts. */
2142                 int postCounter = 0;
2143                 while (true) {
2144                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2145                         if (knownPostId == null) {
2146                                 break;
2147                         }
2148                         synchronized (newPosts) {
2149                                 knownPosts.add(knownPostId);
2150                         }
2151                 }
2152
2153                 /* load known replies. */
2154                 int replyCounter = 0;
2155                 while (true) {
2156                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2157                         if (knownReplyId == null) {
2158                                 break;
2159                         }
2160                         synchronized (newReplies) {
2161                                 knownReplies.add(knownReplyId);
2162                         }
2163                 }
2164
2165                 /* load bookmarked posts. */
2166                 int bookmarkedPostCounter = 0;
2167                 while (true) {
2168                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2169                         if (bookmarkedPostId == null) {
2170                                 break;
2171                         }
2172                         synchronized (bookmarkedPosts) {
2173                                 bookmarkedPosts.add(bookmarkedPostId);
2174                         }
2175                 }
2176
2177         }
2178
2179         /**
2180          * Generate a Sone URI from the given URI and latest edition.
2181          *
2182          * @param uriString
2183          *            The URI to derive the Sone URI from
2184          * @return The derived URI
2185          */
2186         private FreenetURI getSoneUri(String uriString) {
2187                 try {
2188                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
2189                         return uri;
2190                 } catch (MalformedURLException mue1) {
2191                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
2192                         return null;
2193                 }
2194         }
2195
2196         //
2197         // INTERFACE IdentityListener
2198         //
2199
2200         /**
2201          * {@inheritDoc}
2202          */
2203         @Override
2204         public void ownIdentityAdded(OwnIdentity ownIdentity) {
2205                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
2206                 if (ownIdentity.hasContext("Sone")) {
2207                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2208                         addLocalSone(ownIdentity);
2209                 }
2210         }
2211
2212         /**
2213          * {@inheritDoc}
2214          */
2215         @Override
2216         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
2217                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
2218                 trustedIdentities.remove(ownIdentity);
2219         }
2220
2221         /**
2222          * {@inheritDoc}
2223          */
2224         @Override
2225         public void identityAdded(OwnIdentity ownIdentity, Identity identity) {
2226                 logger.log(Level.FINEST, "Adding Identity: " + identity);
2227                 trustedIdentities.get(ownIdentity).add(identity);
2228                 addRemoteSone(identity);
2229         }
2230
2231         /**
2232          * {@inheritDoc}
2233          */
2234         @Override
2235         public void identityUpdated(OwnIdentity ownIdentity, final Identity identity) {
2236                 new Thread(new Runnable() {
2237
2238                         @Override
2239                         @SuppressWarnings("synthetic-access")
2240                         public void run() {
2241                                 Sone sone = getRemoteSone(identity.getId());
2242                                 sone.setIdentity(identity);
2243                                 soneDownloader.addSone(sone);
2244                                 soneDownloader.fetchSone(sone);
2245                         }
2246                 }).start();
2247         }
2248
2249         /**
2250          * {@inheritDoc}
2251          */
2252         @Override
2253         public void identityRemoved(OwnIdentity ownIdentity, Identity identity) {
2254                 trustedIdentities.get(ownIdentity).remove(identity);
2255         }
2256
2257         //
2258         // INTERFACE UpdateListener
2259         //
2260
2261         /**
2262          * {@inheritDoc}
2263          */
2264         @Override
2265         public void updateFound(Version version, long releaseTime, long latestEdition) {
2266                 coreListenerManager.fireUpdateFound(version, releaseTime, latestEdition);
2267         }
2268
2269         //
2270         // INTERFACE ImageInsertListener
2271         //
2272
2273         /**
2274          * {@inheritDoc}
2275          */
2276         @Override
2277         public void imageInsertStarted(Image image) {
2278                 logger.log(Level.WARNING, "Image insert started for " + image);
2279                 coreListenerManager.fireImageInsertStarted(image);
2280         }
2281
2282         /**
2283          * {@inheritDoc}
2284          */
2285         @Override
2286         public void imageInsertAborted(Image image) {
2287                 logger.log(Level.WARNING, "Image insert aborted for " + image);
2288                 coreListenerManager.fireImageInsertAborted(image);
2289         }
2290
2291         /**
2292          * {@inheritDoc}
2293          */
2294         @Override
2295         public void imageInsertFinished(Image image, FreenetURI key) {
2296                 logger.log(Level.WARNING, "Image insert finished for " + image + ": " + key);
2297                 image.setKey(key.toString());
2298                 deleteTemporaryImage(image.getId());
2299                 saveSone(image.getSone());
2300                 coreListenerManager.fireImageInsertFinished(image);
2301         }
2302
2303         /**
2304          * {@inheritDoc}
2305          */
2306         @Override
2307         public void imageInsertFailed(Image image, Throwable cause) {
2308                 logger.log(Level.WARNING, "Image insert failed for " + image, cause);
2309                 coreListenerManager.fireImageInsertFailed(image, cause);
2310         }
2311
2312         /**
2313          * Convenience interface for external classes that want to access the core’s
2314          * configuration.
2315          *
2316          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
2317          */
2318         public static class Preferences {
2319
2320                 /** The wrapped options. */
2321                 private final Options options;
2322
2323                 /**
2324                  * Creates a new preferences object wrapped around the given options.
2325                  *
2326                  * @param options
2327                  *            The options to wrap
2328                  */
2329                 public Preferences(Options options) {
2330                         this.options = options;
2331                 }
2332
2333                 /**
2334                  * Returns the insertion delay.
2335                  *
2336                  * @return The insertion delay
2337                  */
2338                 public int getInsertionDelay() {
2339                         return options.getIntegerOption("InsertionDelay").get();
2340                 }
2341
2342                 /**
2343                  * Sets the insertion delay
2344                  *
2345                  * @param insertionDelay
2346                  *            The new insertion delay, or {@code null} to restore it to
2347                  *            the default value
2348                  * @return This preferences
2349                  */
2350                 public Preferences setInsertionDelay(Integer insertionDelay) {
2351                         options.getIntegerOption("InsertionDelay").set(insertionDelay);
2352                         return this;
2353                 }
2354
2355                 /**
2356                  * Returns the number of posts to show per page.
2357                  *
2358                  * @return The number of posts to show per page
2359                  */
2360                 public int getPostsPerPage() {
2361                         return options.getIntegerOption("PostsPerPage").get();
2362                 }
2363
2364                 /**
2365                  * Sets the number of posts to show per page.
2366                  *
2367                  * @param postsPerPage
2368                  *            The number of posts to show per page
2369                  * @return This preferences object
2370                  */
2371                 public Preferences setPostsPerPage(Integer postsPerPage) {
2372                         options.getIntegerOption("PostsPerPage").set(postsPerPage);
2373                         return this;
2374                 }
2375
2376                 /**
2377                  * Returns the positive trust.
2378                  *
2379                  * @return The positive trust
2380                  */
2381                 public int getPositiveTrust() {
2382                         return options.getIntegerOption("PositiveTrust").get();
2383                 }
2384
2385                 /**
2386                  * Sets the positive trust.
2387                  *
2388                  * @param positiveTrust
2389                  *            The new positive trust, or {@code null} to restore it to
2390                  *            the default vlaue
2391                  * @return This preferences
2392                  */
2393                 public Preferences setPositiveTrust(Integer positiveTrust) {
2394                         options.getIntegerOption("PositiveTrust").set(positiveTrust);
2395                         return this;
2396                 }
2397
2398                 /**
2399                  * Returns the negative trust.
2400                  *
2401                  * @return The negative trust
2402                  */
2403                 public int getNegativeTrust() {
2404                         return options.getIntegerOption("NegativeTrust").get();
2405                 }
2406
2407                 /**
2408                  * Sets the negative trust.
2409                  *
2410                  * @param negativeTrust
2411                  *            The negative trust, or {@code null} to restore it to the
2412                  *            default value
2413                  * @return The preferences
2414                  */
2415                 public Preferences setNegativeTrust(Integer negativeTrust) {
2416                         options.getIntegerOption("NegativeTrust").set(negativeTrust);
2417                         return this;
2418                 }
2419
2420                 /**
2421                  * Returns the trust comment. This is the comment that is set in the web
2422                  * of trust when a trust value is assigned to an identity.
2423                  *
2424                  * @return The trust comment
2425                  */
2426                 public String getTrustComment() {
2427                         return options.getStringOption("TrustComment").get();
2428                 }
2429
2430                 /**
2431                  * Sets the trust comment.
2432                  *
2433                  * @param trustComment
2434                  *            The trust comment, or {@code null} to restore it to the
2435                  *            default value
2436                  * @return This preferences
2437                  */
2438                 public Preferences setTrustComment(String trustComment) {
2439                         options.getStringOption("TrustComment").set(trustComment);
2440                         return this;
2441                 }
2442
2443                 /**
2444                  * Returns whether the rescue mode is active.
2445                  *
2446                  * @return {@code true} if the rescue mode is active, {@code false}
2447                  *         otherwise
2448                  */
2449                 public boolean isSoneRescueMode() {
2450                         return options.getBooleanOption("SoneRescueMode").get();
2451                 }
2452
2453                 /**
2454                  * Sets whether the rescue mode is active.
2455                  *
2456                  * @param soneRescueMode
2457                  *            {@code true} if the rescue mode is active, {@code false}
2458                  *            otherwise
2459                  * @return This preferences
2460                  */
2461                 public Preferences setSoneRescueMode(Boolean soneRescueMode) {
2462                         options.getBooleanOption("SoneRescueMode").set(soneRescueMode);
2463                         return this;
2464                 }
2465
2466                 /**
2467                  * Returns whether Sone should clear its settings on the next restart.
2468                  * In order to be effective, {@link #isReallyClearOnNextRestart()} needs
2469                  * to return {@code true} as well!
2470                  *
2471                  * @return {@code true} if Sone should clear its settings on the next
2472                  *         restart, {@code false} otherwise
2473                  */
2474                 public boolean isClearOnNextRestart() {
2475                         return options.getBooleanOption("ClearOnNextRestart").get();
2476                 }
2477
2478                 /**
2479                  * Sets whether Sone will clear its settings on the next restart.
2480                  *
2481                  * @param clearOnNextRestart
2482                  *            {@code true} if Sone should clear its settings on the next
2483                  *            restart, {@code false} otherwise
2484                  * @return This preferences
2485                  */
2486                 public Preferences setClearOnNextRestart(Boolean clearOnNextRestart) {
2487                         options.getBooleanOption("ClearOnNextRestart").set(clearOnNextRestart);
2488                         return this;
2489                 }
2490
2491                 /**
2492                  * Returns whether Sone should really clear its settings on next
2493                  * restart. This is a confirmation option that needs to be set in
2494                  * addition to {@link #isClearOnNextRestart()} in order to clear Sone’s
2495                  * settings on the next restart.
2496                  *
2497                  * @return {@code true} if Sone should really clear its settings on the
2498                  *         next restart, {@code false} otherwise
2499                  */
2500                 public boolean isReallyClearOnNextRestart() {
2501                         return options.getBooleanOption("ReallyClearOnNextRestart").get();
2502                 }
2503
2504                 /**
2505                  * Sets whether Sone should really clear its settings on the next
2506                  * restart.
2507                  *
2508                  * @param reallyClearOnNextRestart
2509                  *            {@code true} if Sone should really clear its settings on
2510                  *            the next restart, {@code false} otherwise
2511                  * @return This preferences
2512                  */
2513                 public Preferences setReallyClearOnNextRestart(Boolean reallyClearOnNextRestart) {
2514                         options.getBooleanOption("ReallyClearOnNextRestart").set(reallyClearOnNextRestart);
2515                         return this;
2516                 }
2517
2518         }
2519
2520 }