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                 return trustedIdentities.containsKey(origin) && trustedIdentities.get(origin.getIdentity()).contains(target);
 545         }
 546
 547         /**
 548          * Returns the post with the given ID.
 549          *
 550          * @param postId
 551          *            The ID of the post to get
 552          * @return The post, or {@code null} if there is no such post
 553          */
 554         public Post getPost(String postId) {
 555                 return getPost(postId, true);
 556         }
 557
 558         /**
 559          * Returns the post with the given ID, optionally creating a new post.
 560          *
 561          * @param postId
 562          *            The ID of the post to get
 563          * @param create
 564          *            {@code true} it create a new post if no post with the given ID
 565          *            exists, {@code false} to return {@code null}
 566          * @return The post, or {@code null} if there is no such post
 567          */
 568         public Post getPost(String postId, boolean create) {
 569                 synchronized (posts) {
 570                         Post post = posts.get(postId);
 571                         if ((post == null) && create) {
 572                                 post = new Post(postId);
 573                                 posts.put(postId, post);
 574                         }
 575                         return post;
 576                 }
 577         }
 578
 579         /**
 580          * Returns whether the given post ID is new.
 581          *
 582          * @param postId
 583          *            The post ID
 584          * @return {@code true} if the post is considered to be new, {@code false}
 585          *         otherwise
 586          */
 587         public boolean isNewPost(String postId) {
 588                 synchronized (newPosts) {
 589                         return !knownPosts.contains(postId) && newPosts.contains(postId);
 590                 }
 591         }
 592
 593         /**
 594          * Returns the reply with the given ID. If there is no reply with the given
 595          * ID yet, a new one is created.
 596          *
 597          * @param replyId
 598          *            The ID of the reply to get
 599          * @return The reply
 600          */
 601         public Reply getReply(String replyId) {
 602                 return getReply(replyId, true);
 603         }
 604
 605         /**
 606          * Returns the reply with the given ID. If there is no reply with the given
 607          * ID yet, a new one is created, unless {@code create} is false in which
 608          * case {@code null} is returned.
 609          *
 610          * @param replyId
 611          *            The ID of the reply to get
 612          * @param create
 613          *            {@code true} to always return a {@link Reply}, {@code false}
 614          *            to return {@code null} if no reply can be found
 615          * @return The reply, or {@code null} if there is no such reply
 616          */
 617         public Reply getReply(String replyId, boolean create) {
 618                 synchronized (replies) {
 619                         Reply reply = replies.get(replyId);
 620                         if (create && (reply == null)) {
 621                                 reply = new Reply(replyId);
 622                                 replies.put(replyId, reply);
 623                         }
 624                         return reply;
 625                 }
 626         }
 627
 628         /**
 629          * Returns all replies for the given post, order ascending by time.
 630          *
 631          * @param post
 632          *            The post to get all replies for
 633          * @return All replies for the given post
 634          */
 635         public List<Reply> getReplies(Post post) {
 636                 Set<Sone> sones = getSones();
 637                 List<Reply> replies = new ArrayList<Reply>();
 638                 for (Sone sone : sones) {
 639                         for (Reply reply : sone.getReplies()) {
 640                                 if (reply.getPost().equals(post)) {
 641                                         replies.add(reply);
 642                                 }
 643                         }
 644                 }
 645                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 646                 return replies;
 647         }
 648
 649         /**
 650          * Returns whether the reply with the given ID is new.
 651          *
 652          * @param replyId
 653          *            The ID of the reply to check
 654          * @return {@code true} if the reply is considered to be new, {@code false}
 655          *         otherwise
 656          */
 657         public boolean isNewReply(String replyId) {
 658                 synchronized (newReplies) {
 659                         return !knownReplies.contains(replyId) && newReplies.contains(replyId);
 660                 }
 661         }
 662
 663         /**
 664          * Returns all Sones that have liked the given post.
 665          *
 666          * @param post
 667          *            The post to get the liking Sones for
 668          * @return The Sones that like the given post
 669          */
 670         public Set<Sone> getLikes(Post post) {
 671                 Set<Sone> sones = new HashSet<Sone>();
 672                 for (Sone sone : getSones()) {
 673                         if (sone.getLikedPostIds().contains(post.getId())) {
 674                                 sones.add(sone);
 675                         }
 676                 }
 677                 return sones;
 678         }
 679
 680         /**
 681          * Returns all Sones that have liked the given reply.
 682          *
 683          * @param reply
 684          *            The reply to get the liking Sones for
 685          * @return The Sones that like the given reply
 686          */
 687         public Set<Sone> getLikes(Reply reply) {
 688                 Set<Sone> sones = new HashSet<Sone>();
 689                 for (Sone sone : getSones()) {
 690                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 691                                 sones.add(sone);
 692                         }
 693                 }
 694                 return sones;
 695         }
 696
 697         /**
 698          * Returns whether the given post is bookmarked.
 699          *
 700          * @param post
 701          *            The post to check
 702          * @return {@code true} if the given post is bookmarked, {@code false}
 703          *         otherwise
 704          */
 705         public boolean isBookmarked(Post post) {
 706                 return isPostBookmarked(post.getId());
 707         }
 708
 709         /**
 710          * Returns whether the post with the given ID is bookmarked.
 711          *
 712          * @param id
 713          *            The ID of the post to check
 714          * @return {@code true} if the post with the given ID is bookmarked,
 715          *         {@code false} otherwise
 716          */
 717         public boolean isPostBookmarked(String id) {
 718                 synchronized (bookmarkedPosts) {
 719                         return bookmarkedPosts.contains(id);
 720                 }
 721         }
 722
 723         /**
 724          * Returns all currently known bookmarked posts.
 725          *
 726          * @return All bookmarked posts
 727          */
 728         public Set<Post> getBookmarkedPosts() {
 729                 Set<Post> posts = new HashSet<Post>();
 730                 synchronized (bookmarkedPosts) {
 731                         for (String bookmarkedPostId : bookmarkedPosts) {
 732                                 Post post = getPost(bookmarkedPostId, false);
 733                                 if (post != null) {
 734                                         posts.add(post);
 735                                 }
 736                         }
 737                 }
 738                 return posts;
 739         }
 740
 741         /**
 742          * Returns the album with the given ID, creating a new album if no album
 743          * with the given ID can be found.
 744          *
 745          * @param albumId
 746          *            The ID of the album
 747          * @return The album with the given ID
 748          */
 749         public Album getAlbum(String albumId) {
 750                 return getAlbum(albumId, true);
 751         }
 752
 753         /**
 754          * Returns the album with the given ID, optionally creating a new album if
 755          * an album with the given ID can not be found.
 756          *
 757          * @param albumId
 758          *            The ID of the album
 759          * @param create
 760          *            {@code true} to create a new album if none exists for the
 761          *            given ID
 762          * @return The album with the given ID, or {@code null} if no album with the
 763          *         given ID exists and {@code create} is {@code false}
 764          */
 765         public Album getAlbum(String albumId, boolean create) {
 766                 synchronized (albums) {
 767                         Album album = albums.get(albumId);
 768                         if (create && (album == null)) {
 769                                 album = new Album(albumId);
 770                                 albums.put(albumId, album);
 771                         }
 772                         return album;
 773                 }
 774         }
 775
 776         /**
 777          * Returns the image with the given ID, creating it if necessary.
 778          *
 779          * @param imageId
 780          *            The ID of the image
 781          * @return The image with the given ID
 782          */
 783         public Image getImage(String imageId) {
 784                 return getImage(imageId, true);
 785         }
 786
 787         /**
 788          * Returns the image with the given ID, optionally creating it if it does
 789          * not exist.
 790          *
 791          * @param imageId
 792          *            The ID of the image
 793          * @param create
 794          *            {@code true} to create an image if none exists with the given
 795          *            ID
 796          * @return The image with the given ID, or {@code null} if none exists and
 797          *         none was created
 798          */
 799         public Image getImage(String imageId, boolean create) {
 800                 synchronized (images) {
 801                         Image image = images.get(imageId);
 802                         if (create && (image == null)) {
 803                                 image = new Image(imageId);
 804                                 images.put(imageId, image);
 805                         }
 806                         return image;
 807                 }
 808         }
 809
 810         /**
 811          * Returns the temporary image with the given ID.
 812          *
 813          * @param imageId
 814          *            The ID of the temporary image
 815          * @return The temporary image, or {@code null} if there is no temporary
 816          *         image with the given ID
 817          */
 818         public TemporaryImage getTemporaryImage(String imageId) {
 819                 synchronized (temporaryImages) {
 820                         return temporaryImages.get(imageId);
 821                 }
 822         }
 823
 824         //
 825         // ACTIONS
 826         //
 827
 828         /**
 829          * Locks the given Sone. A locked Sone will not be inserted by
 830          * {@link SoneInserter} until it is {@link #unlockSone(Sone) unlocked}
 831          * again.
 832          *
 833          * @param sone
 834          *            The sone to lock
 835          */
 836         public void lockSone(Sone sone) {
 837                 synchronized (lockedSones) {
 838                         if (lockedSones.add(sone)) {
 839                                 coreListenerManager.fireSoneLocked(sone);
 840                         }
 841                 }
 842         }
 843
 844         /**
 845          * Unlocks the given Sone.
 846          *
 847          * @see #lockSone(Sone)
 848          * @param sone
 849          *            The sone to unlock
 850          */
 851         public void unlockSone(Sone sone) {
 852                 synchronized (lockedSones) {
 853                         if (lockedSones.remove(sone)) {
 854                                 coreListenerManager.fireSoneUnlocked(sone);
 855                         }
 856                 }
 857         }
 858
 859         /**
 860          * Adds a local Sone from the given ID which has to be the ID of an own
 861          * identity.
 862          *
 863          * @param id
 864          *            The ID of an own identity to add a Sone for
 865          * @return The added (or already existing) Sone
 866          */
 867         public Sone addLocalSone(String id) {
 868                 synchronized (localSones) {
 869                         if (localSones.containsKey(id)) {
 870                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 871                                 return localSones.get(id);
 872                         }
 873                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 874                         if (ownIdentity == null) {
 875                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 876                                 return null;
 877                         }
 878                         return addLocalSone(ownIdentity);
 879                 }
 880         }
 881
 882         /**
 883          * Adds a local Sone from the given own identity.
 884          *
 885          * @param ownIdentity
 886          *            The own identity to create a Sone from
 887          * @return The added (or already existing) Sone
 888          */
 889         public Sone addLocalSone(OwnIdentity ownIdentity) {
 890                 if (ownIdentity == null) {
 891                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 892                         return null;
 893                 }
 894                 synchronized (localSones) {
 895                         final Sone sone;
 896                         try {
 897                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 898                         } catch (MalformedURLException mue1) {
 899                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 900                                 return null;
 901                         }
 902                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 903                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 904                         /* TODO - load posts ’n stuff */
 905                         localSones.put(ownIdentity.getId(), sone);
 906                         final SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 907                         soneInserters.put(sone, soneInserter);
 908                         setSoneStatus(sone, SoneStatus.idle);
 909                         loadSone(sone);
 910                         if (!preferences.isSoneRescueMode()) {
 911                                 soneInserter.start();
 912                         }
 913                         new Thread(new Runnable() {
 914
 915                                 @Override
 916                                 @SuppressWarnings("synthetic-access")
 917                                 public void run() {
 918                                         if (!preferences.isSoneRescueMode()) {
 919                                                 soneDownloader.fetchSone(sone);
 920                                                 return;
 921                                         }
 922                                         logger.log(Level.INFO, "Trying to restore Sone from Freenet…");
 923                                         coreListenerManager.fireRescuingSone(sone);
 924                                         lockSone(sone);
 925                                         long edition = sone.getLatestEdition();
 926                                         while (!stopped && (edition >= 0) && preferences.isSoneRescueMode()) {
 927                                                 logger.log(Level.FINE, "Downloading edition " + edition + "…");
 928                                                 soneDownloader.fetchSone(sone, sone.getRequestUri().setKeyType("SSK").setDocName("Sone-" + edition));
 929                                                 --edition;
 930                                         }
 931                                         logger.log(Level.INFO, "Finished restoring Sone from Freenet, starting Inserter…");
 932                                         saveSone(sone);
 933                                         coreListenerManager.fireRescuedSone(sone);
 934                                         soneInserter.start();
 935                                 }
 936
 937                         }, "Sone Downloader").start();
 938                         return sone;
 939                 }
 940         }
 941
 942         /**
 943          * Creates a new Sone for the given own identity.
 944          *
 945          * @param ownIdentity
 946          *            The own identity to create a Sone for
 947          * @return The created Sone
 948          */
 949         public Sone createSone(OwnIdentity ownIdentity) {
 950                 try {
 951                         ownIdentity.addContext("Sone");
 952                 } catch (WebOfTrustException wote1) {
 953                         logger.log(Level.SEVERE, "Could not add “Sone” context to own identity: " + ownIdentity, wote1);
 954                         return null;
 955                 }
 956                 Sone sone = addLocalSone(ownIdentity);
 957                 return sone;
 958         }
 959
 960         /**
 961          * Adds the Sone of the given identity.
 962          *
 963          * @param identity
 964          *            The identity whose Sone to add
 965          * @return The added or already existing Sone
 966          */
 967         public Sone addRemoteSone(Identity identity) {
 968                 if (identity == null) {
 969                         logger.log(Level.WARNING, "Given Identity is null!");
 970                         return null;
 971                 }
 972                 synchronized (remoteSones) {
 973                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 974                         boolean newSone = sone.getRequestUri() == null;
 975                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 976                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 977                         if (newSone) {
 978                                 synchronized (newSones) {
 979                                         newSone = !knownSones.contains(sone.getId());
 980                                         if (newSone) {
 981                                                 newSones.add(sone.getId());
 982                                         }
 983                                 }
 984                                 if (newSone) {
 985                                         coreListenerManager.fireNewSoneFound(sone);
 986                                 }
 987                         }
 988                         remoteSones.put(identity.getId(), sone);
 989                         soneDownloader.addSone(sone);
 990                         setSoneStatus(sone, SoneStatus.unknown);
 991                         new Thread(new Runnable() {
 992
 993                                 @Override
 994                                 @SuppressWarnings("synthetic-access")
 995                                 public void run() {
 996                                         soneDownloader.fetchSone(sone);
 997                                 }
 998
 999                         }, "Sone Downloader").start();
1000                         return sone;
1001                 }
1002         }
1003
1004         /**
1005          * Retrieves the trust relationship from the origin to the target. If the
1006          * trust relationship can not be retrieved, {@code null} is returned.
1007          *
1008          * @see Identity#getTrust(OwnIdentity)
1009          * @param origin
1010          *            The origin of the trust tree
1011          * @param target
1012          *            The target of the trust
1013          * @return The trust relationship
1014          */
1015         public Trust getTrust(Sone origin, Sone target) {
1016                 if (!isLocalSone(origin)) {
1017                         logger.log(Level.WARNING, "Tried to get trust from remote Sone: %s", origin);
1018                         return null;
1019                 }
1020                 return target.getIdentity().getTrust((OwnIdentity) origin.getIdentity());
1021         }
1022
1023         /**
1024          * Sets the trust value of the given origin Sone for the target Sone.
1025          *
1026          * @param origin
1027          *            The origin Sone
1028          * @param target
1029          *            The target Sone
1030          * @param trustValue
1031          *            The trust value (from {@code -100} to {@code 100})
1032          */
1033         public void setTrust(Sone origin, Sone target, int trustValue) {
1034                 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();
1035                 try {
1036                         ((OwnIdentity) origin.getIdentity()).setTrust(target.getIdentity(), trustValue, preferences.getTrustComment());
1037                 } catch (WebOfTrustException wote1) {
1038                         logger.log(Level.WARNING, "Could not set trust for Sone: " + target, wote1);
1039                 }
1040         }
1041
1042         /**
1043          * Removes any trust assignment for the given target Sone.
1044          *
1045          * @param origin
1046          *            The trust origin
1047          * @param target
1048          *            The trust target
1049          */
1050         public void removeTrust(Sone origin, Sone target) {
1051                 Validation.begin().isNotNull("Trust Origin", origin).isNotNull("Trust Target", target).check().isInstanceOf("Trust Origin Identity", origin.getIdentity(), OwnIdentity.class).check();
1052                 try {
1053                         ((OwnIdentity) origin.getIdentity()).removeTrust(target.getIdentity());
1054                 } catch (WebOfTrustException wote1) {
1055                         logger.log(Level.WARNING, "Could not remove trust for Sone: " + target, wote1);
1056                 }
1057         }
1058
1059         /**
1060          * Assigns the configured positive trust value for the given target.
1061          *
1062          * @param origin
1063          *            The trust origin
1064          * @param target
1065          *            The trust target
1066          */
1067         public void trustSone(Sone origin, Sone target) {
1068                 setTrust(origin, target, preferences.getPositiveTrust());
1069         }
1070
1071         /**
1072          * Assigns the configured negative trust value for the given target.
1073          *
1074          * @param origin
1075          *            The trust origin
1076          * @param target
1077          *            The trust target
1078          */
1079         public void distrustSone(Sone origin, Sone target) {
1080                 setTrust(origin, target, preferences.getNegativeTrust());
1081         }
1082
1083         /**
1084          * Removes the trust assignment for the given target.
1085          *
1086          * @param origin
1087          *            The trust origin
1088          * @param target
1089          *            The trust target
1090          */
1091         public void untrustSone(Sone origin, Sone target) {
1092                 removeTrust(origin, target);
1093         }
1094
1095         /**
1096          * Updates the stores Sone with the given Sone.
1097          *
1098          * @param sone
1099          *            The updated Sone
1100          */
1101         public void updateSone(Sone sone) {
1102                 if (hasSone(sone.getId())) {
1103                         boolean soneRescueMode = isLocalSone(sone) && preferences.isSoneRescueMode();
1104                         Sone storedSone = getSone(sone.getId());
1105                         if (!soneRescueMode && !(sone.getTime() > storedSone.getTime())) {
1106                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
1107                                 return;
1108                         }
1109                         synchronized (posts) {
1110                                 if (!soneRescueMode) {
1111                                         for (Post post : storedSone.getPosts()) {
1112                                                 posts.remove(post.getId());
1113                                                 if (!sone.getPosts().contains(post)) {
1114                                                         coreListenerManager.firePostRemoved(post);
1115                                                 }
1116                                         }
1117                                 }
1118                                 List<Post> storedPosts = storedSone.getPosts();
1119                                 synchronized (newPosts) {
1120                                         for (Post post : sone.getPosts()) {
1121                                                 post.setSone(storedSone);
1122                                                 if (!storedPosts.contains(post) && !knownPosts.contains(post.getId())) {
1123                                                         newPosts.add(post.getId());
1124                                                         coreListenerManager.fireNewPostFound(post);
1125                                                 }
1126                                                 posts.put(post.getId(), post);
1127                                         }
1128                                 }
1129                         }
1130                         synchronized (replies) {
1131                                 if (!soneRescueMode) {
1132                                         for (Reply reply : storedSone.getReplies()) {
1133                                                 replies.remove(reply.getId());
1134                                                 if (!sone.getReplies().contains(reply)) {
1135                                                         coreListenerManager.fireReplyRemoved(reply);
1136                                                 }
1137                                         }
1138                                 }
1139                                 Set<Reply> storedReplies = storedSone.getReplies();
1140                                 synchronized (newReplies) {
1141                                         for (Reply reply : sone.getReplies()) {
1142                                                 reply.setSone(storedSone);
1143                                                 if (!storedReplies.contains(reply) && !knownReplies.contains(reply.getId())) {
1144                                                         newReplies.add(reply.getId());
1145                                                         coreListenerManager.fireNewReplyFound(reply);
1146                                                 }
1147                                                 replies.put(reply.getId(), reply);
1148                                         }
1149                                 }
1150                         }
1151                         synchronized (storedSone) {
1152                                 if (!soneRescueMode || (sone.getTime() > storedSone.getTime())) {
1153                                         storedSone.setTime(sone.getTime());
1154                                 }
1155                                 storedSone.setClient(sone.getClient());
1156                                 storedSone.setProfile(sone.getProfile());
1157                                 if (soneRescueMode) {
1158                                         for (Post post : sone.getPosts()) {
1159                                                 storedSone.addPost(post);
1160                                         }
1161                                         for (Reply reply : sone.getReplies()) {
1162                                                 storedSone.addReply(reply);
1163                                         }
1164                                         for (String likedPostId : sone.getLikedPostIds()) {
1165                                                 storedSone.addLikedPostId(likedPostId);
1166                                         }
1167                                         for (String likedReplyId : sone.getLikedReplyIds()) {
1168                                                 storedSone.addLikedReplyId(likedReplyId);
1169                                         }
1170                                 } else {
1171                                         storedSone.setPosts(sone.getPosts());
1172                                         storedSone.setReplies(sone.getReplies());
1173                                         storedSone.setLikePostIds(sone.getLikedPostIds());
1174                                         storedSone.setLikeReplyIds(sone.getLikedReplyIds());
1175                                 }
1176                                 storedSone.setLatestEdition(sone.getLatestEdition());
1177                         }
1178                 }
1179         }
1180
1181         /**
1182          * Deletes the given Sone. This will remove the Sone from the
1183          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
1184          * and remove the context from its identity.
1185          *
1186          * @param sone
1187          *            The Sone to delete
1188          */
1189         public void deleteSone(Sone sone) {
1190                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1191                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
1192                         return;
1193                 }
1194                 synchronized (localSones) {
1195                         if (!localSones.containsKey(sone.getId())) {
1196                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
1197                                 return;
1198                         }
1199                         localSones.remove(sone.getId());
1200                         soneInserters.remove(sone).stop();
1201                 }
1202                 try {
1203                         ((OwnIdentity) sone.getIdentity()).removeContext("Sone");
1204                         ((OwnIdentity) sone.getIdentity()).removeProperty("Sone.LatestEdition");
1205                 } catch (WebOfTrustException wote1) {
1206                         logger.log(Level.WARNING, "Could not remove context and properties from Sone: " + sone, wote1);
1207                 }
1208                 try {
1209                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
1210                 } catch (ConfigurationException ce1) {
1211                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
1212                 }
1213         }
1214
1215         /**
1216          * Marks the given Sone as known. If the Sone was {@link #isNewPost(String)
1217          * new} before, a {@link CoreListener#markSoneKnown(Sone)} event is fired.
1218          *
1219          * @param sone
1220          *            The Sone to mark as known
1221          */
1222         public void markSoneKnown(Sone sone) {
1223                 synchronized (newSones) {
1224                         if (newSones.remove(sone.getId())) {
1225                                 knownSones.add(sone.getId());
1226                                 coreListenerManager.fireMarkSoneKnown(sone);
1227                                 saveConfiguration();
1228                         }
1229                 }
1230         }
1231
1232         /**
1233          * Loads and updates the given Sone from the configuration. If any error is
1234          * encountered, loading is aborted and the given Sone is not changed.
1235          *
1236          * @param sone
1237          *            The Sone to load and update
1238          */
1239         public void loadSone(Sone sone) {
1240                 if (!isLocalSone(sone)) {
1241                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
1242                         return;
1243                 }
1244
1245                 /* load Sone. */
1246                 String sonePrefix = "Sone/" + sone.getId();
1247                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
1248                 if (soneTime == null) {
1249                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
1250                         return;
1251                 }
1252                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
1253
1254                 /* load profile. */
1255                 Profile profile = new Profile();
1256                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
1257                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
1258                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
1259                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
1260                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
1261                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
1262
1263                 /* load profile fields. */
1264                 while (true) {
1265                         String fieldPrefix = sonePrefix + "/Profile/Fields/" + profile.getFields().size();
1266                         String fieldName = configuration.getStringValue(fieldPrefix + "/Name").getValue(null);
1267                         if (fieldName == null) {
1268                                 break;
1269                         }
1270                         String fieldValue = configuration.getStringValue(fieldPrefix + "/Value").getValue("");
1271                         profile.addField(fieldName).setValue(fieldValue);
1272                 }
1273
1274                 /* load posts. */
1275                 Set<Post> posts = new HashSet<Post>();
1276                 while (true) {
1277                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
1278                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
1279                         if (postId == null) {
1280                                 break;
1281                         }
1282                         String postRecipientId = configuration.getStringValue(postPrefix + "/Recipient").getValue(null);
1283                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
1284                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
1285                         if ((postTime == 0) || (postText == null)) {
1286                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
1287                                 return;
1288                         }
1289                         Post post = getPost(postId).setSone(sone).setTime(postTime).setText(postText);
1290                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
1291                                 post.setRecipient(getSone(postRecipientId));
1292                         }
1293                         posts.add(post);
1294                 }
1295
1296                 /* load replies. */
1297                 Set<Reply> replies = new HashSet<Reply>();
1298                 while (true) {
1299                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
1300                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
1301                         if (replyId == null) {
1302                                 break;
1303                         }
1304                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
1305                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
1306                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
1307                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
1308                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
1309                                 return;
1310                         }
1311                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
1312                 }
1313
1314                 /* load post likes. */
1315                 Set<String> likedPostIds = new HashSet<String>();
1316                 while (true) {
1317                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
1318                         if (likedPostId == null) {
1319                                 break;
1320                         }
1321                         likedPostIds.add(likedPostId);
1322                 }
1323
1324                 /* load reply likes. */
1325                 Set<String> likedReplyIds = new HashSet<String>();
1326                 while (true) {
1327                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
1328                         if (likedReplyId == null) {
1329                                 break;
1330                         }
1331                         likedReplyIds.add(likedReplyId);
1332                 }
1333
1334                 /* load friends. */
1335                 Set<String> friends = new HashSet<String>();
1336                 while (true) {
1337                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
1338                         if (friendId == null) {
1339                                 break;
1340                         }
1341                         friends.add(friendId);
1342                 }
1343
1344                 /* load albums. */
1345                 List<Album> topLevelAlbums = new ArrayList<Album>();
1346                 while (true) {
1347                         String albumPrefix = sonePrefix + "/Albums/" + albums.size();
1348                         String albumId = configuration.getStringValue(albumPrefix + "/ID").getValue(null);
1349                         if (albumId == null) {
1350                                 break;
1351                         }
1352                         String albumTitle = configuration.getStringValue(albumPrefix + "/Title").getValue(null);
1353                         String albumDescription = configuration.getStringValue(albumPrefix + "/Description").getValue(null);
1354                         String albumParentId = configuration.getStringValue(albumPrefix + "/Parent").getValue(null);
1355                         if ((albumTitle == null) || (albumDescription == null)) {
1356                                 logger.log(Level.WARNING, "Invalid album found, aborting load!");
1357                                 return;
1358                         }
1359                         Album album = getAlbum(albumId).setSone(sone).setTitle(albumTitle).setDescription(albumDescription);
1360                         if (albumParentId != null) {
1361                                 Album parentAlbum = getAlbum(albumParentId, false);
1362                                 if (parentAlbum == null) {
1363                                         logger.log(Level.WARNING, "Invalid parent album ID: " + albumParentId);
1364                                         return;
1365                                 }
1366                                 parentAlbum.addAlbum(album);
1367                         } else {
1368                                 topLevelAlbums.add(album);
1369                         }
1370                 }
1371
1372                 /* load images. */
1373                 int imageCounter = 0;
1374                 while (true) {
1375                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1376                         String imageId = configuration.getStringValue(imagePrefix + "/ID").getValue(null);
1377                         if (imageId == null) {
1378                                 break;
1379                         }
1380                         String albumId = configuration.getStringValue(imagePrefix + "/Album").getValue(null);
1381                         String key = configuration.getStringValue(imagePrefix + "/Key").getValue(null);
1382                         String title = configuration.getStringValue(imagePrefix + "/Title").getValue(null);
1383                         String description = configuration.getStringValue(imagePrefix + "/Description").getValue(null);
1384                         Long creationTime = configuration.getLongValue(imagePrefix + "/CreationTime").getValue(null);
1385                         Integer width = configuration.getIntValue(imagePrefix + "/Width").getValue(null);
1386                         Integer height = configuration.getIntValue(imagePrefix + "/Height").getValue(null);
1387                         if ((albumId == null) || (key == null) || (title == null) || (description == null) || (creationTime == null) || (width == null) || (height == null)) {
1388                                 logger.log(Level.WARNING, "Invalid image found, aborting load!");
1389                                 return;
1390                         }
1391                         Album album = getAlbum(albumId, false);
1392                         if (album == null) {
1393                                 logger.log(Level.WARNING, "Invalid album image encountered, aborting load!");
1394                                 return;
1395                         }
1396                         Image image = getImage(imageId).setSone(sone).setCreationTime(creationTime).setKey(key);
1397                         image.setTitle(title).setDescription(description).setWidth(width).setHeight(height);
1398                         album.addImage(image);
1399                 }
1400
1401                 /* load options. */
1402                 sone.getOptions().addBooleanOption("AutoFollow", new DefaultOption<Boolean>(false));
1403                 sone.getOptions().getBooleanOption("AutoFollow").set(configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").getValue(null));
1404
1405                 /* if we’re still here, Sone was loaded successfully. */
1406                 synchronized (sone) {
1407                         sone.setTime(soneTime);
1408                         sone.setProfile(profile);
1409                         sone.setPosts(posts);
1410                         sone.setReplies(replies);
1411                         sone.setLikePostIds(likedPostIds);
1412                         sone.setLikeReplyIds(likedReplyIds);
1413                         sone.setFriends(friends);
1414                         sone.setAlbums(topLevelAlbums);
1415                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
1416                 }
1417                 synchronized (newSones) {
1418                         for (String friend : friends) {
1419                                 knownSones.add(friend);
1420                         }
1421                 }
1422                 synchronized (newPosts) {
1423                         for (Post post : posts) {
1424                                 knownPosts.add(post.getId());
1425                         }
1426                 }
1427                 synchronized (newReplies) {
1428                         for (Reply reply : replies) {
1429                                 knownReplies.add(reply.getId());
1430                         }
1431                 }
1432         }
1433
1434         /**
1435          * Saves the given Sone. This will persist all local settings for the given
1436          * Sone, such as the friends list and similar, private options.
1437          *
1438          * @param sone
1439          *            The Sone to save
1440          */
1441         public synchronized void saveSone(Sone sone) {
1442                 if (!isLocalSone(sone)) {
1443                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
1444                         return;
1445                 }
1446                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
1447                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
1448                         return;
1449                 }
1450
1451                 logger.log(Level.INFO, "Saving Sone: %s", sone);
1452                 try {
1453                         ((OwnIdentity) sone.getIdentity()).setProperty("Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
1454
1455                         /* save Sone into configuration. */
1456                         String sonePrefix = "Sone/" + sone.getId();
1457                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
1458                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
1459
1460                         /* save profile. */
1461                         Profile profile = sone.getProfile();
1462                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
1463                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
1464                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
1465                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
1466                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
1467                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
1468
1469                         /* save profile fields. */
1470                         int fieldCounter = 0;
1471                         for (Field profileField : profile.getFields()) {
1472                                 String fieldPrefix = sonePrefix + "/Profile/Fields/" + fieldCounter++;
1473                                 configuration.getStringValue(fieldPrefix + "/Name").setValue(profileField.getName());
1474                                 configuration.getStringValue(fieldPrefix + "/Value").setValue(profileField.getValue());
1475                         }
1476                         configuration.getStringValue(sonePrefix + "/Profile/Fields/" + fieldCounter + "/Name").setValue(null);
1477
1478                         /* save posts. */
1479                         int postCounter = 0;
1480                         for (Post post : sone.getPosts()) {
1481                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
1482                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
1483                                 configuration.getStringValue(postPrefix + "/Recipient").setValue((post.getRecipient() != null) ? post.getRecipient().getId() : null);
1484                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
1485                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
1486                         }
1487                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
1488
1489                         /* save replies. */
1490                         int replyCounter = 0;
1491                         for (Reply reply : sone.getReplies()) {
1492                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
1493                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
1494                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
1495                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
1496                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
1497                         }
1498                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
1499
1500                         /* save post likes. */
1501                         int postLikeCounter = 0;
1502                         for (String postId : sone.getLikedPostIds()) {
1503                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
1504                         }
1505                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
1506
1507                         /* save reply likes. */
1508                         int replyLikeCounter = 0;
1509                         for (String replyId : sone.getLikedReplyIds()) {
1510                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
1511                         }
1512                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
1513
1514                         /* save friends. */
1515                         int friendCounter = 0;
1516                         for (String friendId : sone.getFriends()) {
1517                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
1518                         }
1519                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
1520
1521                         /* save albums. first, collect in a flat structure, top-level first. */
1522                         List<Album> albums = new ArrayList<Album>();
1523                         albums.addAll(sone.getAlbums());
1524                         int lastAlbumIndex = 0;
1525                         while (lastAlbumIndex < albums.size()) {
1526                                 int previousAlbumCount = albums.size();
1527                                 for (Album album : new ArrayList<Album>(albums.subList(lastAlbumIndex, albums.size()))) {
1528                                         albums.addAll(album.getAlbums());
1529                                 }
1530                                 lastAlbumIndex = previousAlbumCount;
1531                         }
1532
1533                         int albumCounter = 0;
1534                         for (Album album : albums) {
1535                                 String albumPrefix = sonePrefix + "/Albums/" + albumCounter++;
1536                                 configuration.getStringValue(albumPrefix + "/ID").setValue(album.getId());
1537                                 configuration.getStringValue(albumPrefix + "/Title").setValue(album.getTitle());
1538                                 configuration.getStringValue(albumPrefix + "/Description").setValue(album.getDescription());
1539                                 configuration.getStringValue(albumPrefix + "/Parent").setValue(album.getParent() == null ? null : album.getParent().getId());
1540                         }
1541                         configuration.getStringValue(sonePrefix + "/Albums/" + albumCounter + "/ID").setValue(null);
1542
1543                         /* save images. */
1544                         int imageCounter = 0;
1545                         for (Album album : albums) {
1546                                 for (Image image : album.getImages()) {
1547                                         if (!image.isInserted()) {
1548                                                 continue;
1549                                         }
1550                                         String imagePrefix = sonePrefix + "/Images/" + imageCounter++;
1551                                         configuration.getStringValue(imagePrefix + "/ID").setValue(image.getId());
1552                                         configuration.getStringValue(imagePrefix + "/Album").setValue(album.getId());
1553                                         configuration.getStringValue(imagePrefix + "/Key").setValue(image.getKey());
1554                                         configuration.getStringValue(imagePrefix + "/Title").setValue(image.getTitle());
1555                                         configuration.getStringValue(imagePrefix + "/Description").setValue(image.getDescription());
1556                                         configuration.getLongValue(imagePrefix + "/CreationTime").setValue(image.getCreationTime());
1557                                         configuration.getIntValue(imagePrefix + "/Width").setValue(image.getWidth());
1558                                         configuration.getIntValue(imagePrefix + "/Height").setValue(image.getHeight());
1559                                 }
1560                         }
1561                         configuration.getStringValue(sonePrefix + "/Images/" + imageCounter + "/ID").setValue(null);
1562
1563                         /* save options. */
1564                         configuration.getBooleanValue(sonePrefix + "/Options/AutoFollow").setValue(sone.getOptions().getBooleanOption("AutoFollow").getReal());
1565
1566                         configuration.save();
1567                         logger.log(Level.INFO, "Sone %s saved.", sone);
1568                 } catch (ConfigurationException ce1) {
1569                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
1570                 } catch (WebOfTrustException wote1) {
1571                         logger.log(Level.WARNING, "Could not set WoT property for Sone: " + sone, wote1);
1572                 }
1573         }
1574
1575         /**
1576          * Creates a new post.
1577          *
1578          * @param sone
1579          *            The Sone that creates the post
1580          * @param text
1581          *            The text of the post
1582          * @return The created post
1583          */
1584         public Post createPost(Sone sone, String text) {
1585                 return createPost(sone, System.currentTimeMillis(), text);
1586         }
1587
1588         /**
1589          * Creates a new post.
1590          *
1591          * @param sone
1592          *            The Sone that creates the post
1593          * @param time
1594          *            The time of the post
1595          * @param text
1596          *            The text of the post
1597          * @return The created post
1598          */
1599         public Post createPost(Sone sone, long time, String text) {
1600                 return createPost(sone, null, time, text);
1601         }
1602
1603         /**
1604          * Creates a new post.
1605          *
1606          * @param sone
1607          *            The Sone that creates the post
1608          * @param recipient
1609          *            The recipient Sone, or {@code null} if this post does not have
1610          *            a recipient
1611          * @param text
1612          *            The text of the post
1613          * @return The created post
1614          */
1615         public Post createPost(Sone sone, Sone recipient, String text) {
1616                 return createPost(sone, recipient, System.currentTimeMillis(), text);
1617         }
1618
1619         /**
1620          * Creates a new post.
1621          *
1622          * @param sone
1623          *            The Sone that creates the post
1624          * @param recipient
1625          *            The recipient Sone, or {@code null} if this post does not have
1626          *            a recipient
1627          * @param time
1628          *            The time of the post
1629          * @param text
1630          *            The text of the post
1631          * @return The created post
1632          */
1633         public Post createPost(Sone sone, Sone recipient, long time, String text) {
1634                 if (!isLocalSone(sone)) {
1635                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
1636                         return null;
1637                 }
1638                 Post post = new Post(sone, time, text);
1639                 if (recipient != null) {
1640                         post.setRecipient(recipient);
1641                 }
1642                 synchronized (posts) {
1643                         posts.put(post.getId(), post);
1644                 }
1645                 synchronized (newPosts) {
1646                         knownPosts.add(post.getId());
1647                 }
1648                 sone.addPost(post);
1649                 saveSone(sone);
1650                 return post;
1651         }
1652
1653         /**
1654          * Deletes the given post.
1655          *
1656          * @param post
1657          *            The post to delete
1658          */
1659         public void deletePost(Post post) {
1660                 if (!isLocalSone(post.getSone())) {
1661                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
1662                         return;
1663                 }
1664                 post.getSone().removePost(post);
1665                 synchronized (posts) {
1666                         posts.remove(post.getId());
1667                 }
1668                 saveSone(post.getSone());
1669         }
1670
1671         /**
1672          * Marks the given post as known, if it is currently a new post (according
1673          * to {@link #isNewPost(String)}).
1674          *
1675          * @param post
1676          *            The post to mark as known
1677          */
1678         public void markPostKnown(Post post) {
1679                 synchronized (newPosts) {
1680                         if (newPosts.remove(post.getId())) {
1681                                 knownPosts.add(post.getId());
1682                                 coreListenerManager.fireMarkPostKnown(post);
1683                                 saveConfiguration();
1684                         }
1685                 }
1686         }
1687
1688         /**
1689          * Bookmarks the given post.
1690          *
1691          * @param post
1692          *            The post to bookmark
1693          */
1694         public void bookmark(Post post) {
1695                 bookmarkPost(post.getId());
1696         }
1697
1698         /**
1699          * Bookmarks the post with the given ID.
1700          *
1701          * @param id
1702          *            The ID of the post to bookmark
1703          */
1704         public void bookmarkPost(String id) {
1705                 synchronized (bookmarkedPosts) {
1706                         bookmarkedPosts.add(id);
1707                 }
1708         }
1709
1710         /**
1711          * Removes the given post from the bookmarks.
1712          *
1713          * @param post
1714          *            The post to unbookmark
1715          */
1716         public void unbookmark(Post post) {
1717                 unbookmarkPost(post.getId());
1718         }
1719
1720         /**
1721          * Removes the post with the given ID from the bookmarks.
1722          *
1723          * @param id
1724          *            The ID of the post to unbookmark
1725          */
1726         public void unbookmarkPost(String id) {
1727                 synchronized (bookmarkedPosts) {
1728                         bookmarkedPosts.remove(id);
1729                 }
1730         }
1731
1732         /**
1733          * Creates a new reply.
1734          *
1735          * @param sone
1736          *            The Sone that creates the reply
1737          * @param post
1738          *            The post that this reply refers to
1739          * @param text
1740          *            The text of the reply
1741          * @return The created reply
1742          */
1743         public Reply createReply(Sone sone, Post post, String text) {
1744                 return createReply(sone, post, System.currentTimeMillis(), text);
1745         }
1746
1747         /**
1748          * Creates a new reply.
1749          *
1750          * @param sone
1751          *            The Sone that creates the reply
1752          * @param post
1753          *            The post that this reply refers to
1754          * @param time
1755          *            The time of the reply
1756          * @param text
1757          *            The text of the reply
1758          * @return The created reply
1759          */
1760         public Reply createReply(Sone sone, Post post, long time, String text) {
1761                 if (!isLocalSone(sone)) {
1762                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
1763                         return null;
1764                 }
1765                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
1766                 synchronized (replies) {
1767                         replies.put(reply.getId(), reply);
1768                 }
1769                 synchronized (newReplies) {
1770                         knownReplies.add(reply.getId());
1771                 }
1772                 sone.addReply(reply);
1773                 saveSone(sone);
1774                 return reply;
1775         }
1776
1777         /**
1778          * Deletes the given reply.
1779          *
1780          * @param reply
1781          *            The reply to delete
1782          */
1783         public void deleteReply(Reply reply) {
1784                 Sone sone = reply.getSone();
1785                 if (!isLocalSone(sone)) {
1786                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
1787                         return;
1788                 }
1789                 synchronized (replies) {
1790                         replies.remove(reply.getId());
1791                 }
1792                 sone.removeReply(reply);
1793                 saveSone(sone);
1794         }
1795
1796         /**
1797          * Marks the given reply as known, if it is currently a new reply (according
1798          * to {@link #isNewReply(String)}).
1799          *
1800          * @param reply
1801          *            The reply to mark as known
1802          */
1803         public void markReplyKnown(Reply reply) {
1804                 synchronized (newReplies) {
1805                         if (newReplies.remove(reply.getId())) {
1806                                 knownReplies.add(reply.getId());
1807                                 coreListenerManager.fireMarkReplyKnown(reply);
1808                                 saveConfiguration();
1809                         }
1810                 }
1811         }
1812
1813         /**
1814          * Creates a new top-level album for the given Sone.
1815          *
1816          * @param sone
1817          *            The Sone to create the album for
1818          * @return The new album
1819          */
1820         public Album createAlbum(Sone sone) {
1821                 return createAlbum(sone, null);
1822         }
1823
1824         /**
1825          * Creates a new album for the given Sone.
1826          *
1827          * @param sone
1828          *            The Sone to create the album for
1829          * @param parent
1830          *            The parent of the album (may be {@code null} to create a
1831          *            top-level album)
1832          * @return The new album
1833          */
1834         public Album createAlbum(Sone sone, Album parent) {
1835                 Album album = new Album();
1836                 synchronized (albums) {
1837                         albums.put(album.getId(), album);
1838                 }
1839                 album.setSone(sone);
1840                 if (parent != null) {
1841                         parent.addAlbum(album);
1842                 } else {
1843                         sone.addAlbum(album);
1844                 }
1845                 return album;
1846         }
1847
1848         /**
1849          * Creates a new image.
1850          *
1851          * @param sone
1852          *            The Sone creating the image
1853          * @param album
1854          *            The album the image will be inserted into
1855          * @param temporaryImage
1856          *            The temporary image to create the image from
1857          * @return The newly created image
1858          */
1859         public Image createImage(Sone sone, Album album, TemporaryImage temporaryImage) {
1860                 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();
1861                 Image image = new Image(temporaryImage.getId()).setSone(sone).setCreationTime(System.currentTimeMillis());
1862                 album.addImage(image);
1863                 synchronized (images) {
1864                         images.put(image.getId(), image);
1865                 }
1866                 return image;
1867         }
1868
1869         /**
1870          * Creates a new temporary image.
1871          *
1872          * @param mimeType
1873          *            The MIME type of the temporary image
1874          * @param imageData
1875          *            The encoded data of the image
1876          * @return The temporary image
1877          */
1878         public TemporaryImage createTemporaryImage(String mimeType, byte[] imageData) {
1879                 TemporaryImage temporaryImage = new TemporaryImage();
1880                 temporaryImage.setMimeType(mimeType).setImageData(imageData);
1881                 synchronized (temporaryImages) {
1882                         temporaryImages.put(temporaryImage.getId(), temporaryImage);
1883                 }
1884                 return temporaryImage;
1885         }
1886
1887         /**
1888          * Deletes the given temporary image.
1889          *
1890          * @param temporaryImage
1891          *            The temporary image to delete
1892          */
1893         public void deteleTemporaryImage(TemporaryImage temporaryImage) {
1894                 Validation.begin().isNotNull("Temporary Image", temporaryImage).check();
1895                 deleteTemporaryImage(temporaryImage.getId());
1896         }
1897
1898         /**
1899          * Deletes the temporary image with the given ID.
1900          *
1901          * @param imageId
1902          *            The ID of the temporary image to delete
1903          */
1904         public void deleteTemporaryImage(String imageId) {
1905                 Validation.begin().isNotNull("Temporary Image ID", imageId).check();
1906                 synchronized (temporaryImages) {
1907                         temporaryImages.remove(imageId);
1908                 }
1909         }
1910
1911         /**
1912          * Starts the core.
1913          */
1914         public void start() {
1915                 loadConfiguration();
1916                 updateChecker.addUpdateListener(this);
1917                 updateChecker.start();
1918         }
1919
1920         /**
1921          * Stops the core.
1922          */
1923         public void stop() {
1924                 synchronized (localSones) {
1925                         for (SoneInserter soneInserter : soneInserters.values()) {
1926                                 soneInserter.stop();
1927                         }
1928                 }
1929                 updateChecker.stop();
1930                 updateChecker.removeUpdateListener(this);
1931                 soneDownloader.stop();
1932                 saveConfiguration();
1933                 stopped = true;
1934         }
1935
1936         /**
1937          * Saves the current options.
1938          */
1939         public void saveConfiguration() {
1940                 synchronized (configuration) {
1941                         if (storingConfiguration) {
1942                                 logger.log(Level.FINE, "Already storing configuration…");
1943                                 return;
1944                         }
1945                         storingConfiguration = true;
1946                 }
1947
1948                 /* store the options first. */
1949                 try {
1950                         configuration.getIntValue("Option/ConfigurationVersion").setValue(0);
1951                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1952                         configuration.getIntValue("Option/PositiveTrust").setValue(options.getIntegerOption("PositiveTrust").getReal());
1953                         configuration.getIntValue("Option/NegativeTrust").setValue(options.getIntegerOption("NegativeTrust").getReal());
1954                         configuration.getStringValue("Option/TrustComment").setValue(options.getStringOption("TrustComment").getReal());
1955                         configuration.getBooleanValue("Option/SoneRescueMode").setValue(options.getBooleanOption("SoneRescueMode").getReal());
1956                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1957                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1958
1959                         /* save known Sones. */
1960                         int soneCounter = 0;
1961                         synchronized (newSones) {
1962                                 for (String knownSoneId : knownSones) {
1963                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1964                                 }
1965                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1966                         }
1967
1968                         /* save known posts. */
1969                         int postCounter = 0;
1970                         synchronized (newPosts) {
1971                                 for (String knownPostId : knownPosts) {
1972                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
1973                                 }
1974                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
1975                         }
1976
1977                         /* save known replies. */
1978                         int replyCounter = 0;
1979                         synchronized (newReplies) {
1980                                 for (String knownReplyId : knownReplies) {
1981                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
1982                                 }
1983                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1984                         }
1985
1986                         /* save bookmarked posts. */
1987                         int bookmarkedPostCounter = 0;
1988                         synchronized (bookmarkedPosts) {
1989                                 for (String bookmarkedPostId : bookmarkedPosts) {
1990                                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(bookmarkedPostId);
1991                                 }
1992                         }
1993                         configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").setValue(null);
1994
1995                         /* now save it. */
1996                         configuration.save();
1997
1998                 } catch (ConfigurationException ce1) {
1999                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
2000                 } finally {
2001                         synchronized (configuration) {
2002                                 storingConfiguration = false;
2003                         }
2004                 }
2005         }
2006
2007         //
2008         // PRIVATE METHODS
2009         //
2010
2011         /**
2012          * Loads the configuration.
2013          */
2014         @SuppressWarnings("unchecked")
2015         private void loadConfiguration() {
2016                 /* create options. */
2017                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
2018
2019                         @Override
2020                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
2021                                 SoneInserter.setInsertionDelay(newValue);
2022                         }
2023
2024                 }));
2025                 options.addIntegerOption("PositiveTrust", new DefaultOption<Integer>(75));
2026                 options.addIntegerOption("NegativeTrust", new DefaultOption<Integer>(-100));
2027                 options.addStringOption("TrustComment", new DefaultOption<String>("Set from Sone Web Interface"));
2028                 options.addBooleanOption("SoneRescueMode", new DefaultOption<Boolean>(false));
2029                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
2030                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
2031
2032                 /* read options from configuration. */
2033                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
2034                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
2035                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
2036                 options.getBooleanOption("ClearOnNextRestart").set(null);
2037                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
2038                 if (clearConfiguration) {
2039                         /* stop loading the configuration. */
2040                         return;
2041                 }
2042
2043                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
2044                 options.getIntegerOption("PositiveTrust").set(configuration.getIntValue("Option/PositiveTrust").getValue(null));
2045                 options.getIntegerOption("NegativeTrust").set(configuration.getIntValue("Option/NegativeTrust").getValue(null));
2046                 options.getStringOption("TrustComment").set(configuration.getStringValue("Option/TrustComment").getValue(null));
2047                 options.getBooleanOption("SoneRescueMode").set(configuration.getBooleanValue("Option/SoneRescueMode").getValue(null));
2048
2049                 /* load known Sones. */
2050                 int soneCounter = 0;
2051                 while (true) {
2052                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
2053                         if (knownSoneId == null) {
2054                                 break;
2055                         }
2056                         synchronized (newSones) {
2057                                 knownSones.add(knownSoneId);
2058                         }
2059                 }
2060
2061                 /* load known posts. */
2062                 int postCounter = 0;
2063                 while (true) {
2064                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
2065                         if (knownPostId == null) {
2066                                 break;
2067                         }
2068                         synchronized (newPosts) {
2069                                 knownPosts.add(knownPostId);
2070                         }
2071                 }
2072
2073                 /* load known replies. */
2074                 int replyCounter = 0;
2075                 while (true) {
2076                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
2077                         if (knownReplyId == null) {
2078                                 break;
2079                         }
2080                         synchronized (newReplies) {
2081                                 knownReplies.add(knownReplyId);
2082                         }
2083                 }
2084
2085                 /* load bookmarked posts. */
2086                 int bookmarkedPostCounter = 0;
2087                 while (true) {
2088                         String bookmarkedPostId = configuration.getStringValue("Bookmarks/Post/" + bookmarkedPostCounter++ + "/ID").getValue(null);
2089                         if (bookmarkedPostId == null) {
2090                                 break;
2091                         }
2092                         synchronized (bookmarkedPosts) {
2093                                 bookmarkedPosts.add(bookmarkedPostId);
2094                         }
2095                 }
2096
2097         }
2098
2099         /**
2100          * Generate a Sone URI from the given URI and latest edition.
2101          *
2102          * @param uriString
2103          *            The URI to derive the Sone URI from
2104          * @return The derived URI
2105          */
2106         private FreenetURI getSoneUri(String uriString) {
2107                 try {
2108                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
2109                         return uri;
2110                 } catch (MalformedURLException mue1) {
2111                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
2112                         return null;
2113                 }
2114         }
2115
2116         //
2117         // INTERFACE IdentityListener
2118         //
2119
2120         /**
2121          * {@inheritDoc}
2122          */
2123         @Override
2124         public void ownIdentityAdded(OwnIdentity ownIdentity) {
2125                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
2126                 if (ownIdentity.hasContext("Sone")) {
2127                         trustedIdentities.put(ownIdentity, Collections.synchronizedSet(new HashSet<Identity>()));
2128                         addLocalSone(ownIdentity);
2129                 }
2130         }
2131
2132         /**
2133          * {@inheritDoc}
2134          */
2135         @Override
2136         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
2137                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
2138                 trustedIdentities.remove(ownIdentity);
2139         }
2140
2141         /**
2142          * {@inheritDoc}
2143          */
2144         @Override
2145         public void identityAdded(OwnIdentity ownIdentity, Identity identity) {
2146                 logger.log(Level.FINEST, "Adding Identity: " + identity);
2147                 trustedIdentities.get(ownIdentity).add(identity);
2148                 addRemoteSone(identity);
2149         }
2150
2151         /**
2152          * {@inheritDoc}
2153          */
2154         @Override
2155         public void identityUpdated(OwnIdentity ownIdentity, final Identity identity) {
2156                 new Thread(new Runnable() {
2157
2158                         @Override
2159                         @SuppressWarnings("synthetic-access")
2160                         public void run() {
2161                                 Sone sone = getRemoteSone(identity.getId());
2162                                 sone.setIdentity(identity);
2163                                 soneDownloader.addSone(sone);
2164                                 soneDownloader.fetchSone(sone);
2165                         }
2166                 }).start();
2167         }
2168
2169         /**
2170          * {@inheritDoc}
2171          */
2172         @Override
2173         public void identityRemoved(OwnIdentity ownIdentity, Identity identity) {
2174                 trustedIdentities.get(ownIdentity).remove(identity);
2175         }
2176
2177         //
2178         // INTERFACE UpdateListener
2179         //
2180
2181         /**
2182          * {@inheritDoc}
2183          */
2184         @Override
2185         public void updateFound(Version version, long releaseTime, long latestEdition) {
2186                 coreListenerManager.fireUpdateFound(version, releaseTime, latestEdition);
2187         }
2188
2189         //
2190         // INTERFACE ImageInsertListener
2191         //
2192
2193         /**
2194          * {@inheritDoc}
2195          */
2196         @Override
2197         public void imageInsertStarted(Image image) {
2198                 logger.log(Level.WARNING, "Image insert started for " + image);
2199                 coreListenerManager.fireImageInsertStarted(image);
2200         }
2201
2202         /**
2203          * {@inheritDoc}
2204          */
2205         @Override
2206         public void imageInsertAborted(Image image) {
2207                 logger.log(Level.WARNING, "Image insert aborted for " + image);
2208                 coreListenerManager.fireImageInsertAborted(image);
2209         }
2210
2211         /**
2212          * {@inheritDoc}
2213          */
2214         @Override
2215         public void imageInsertFinished(Image image, FreenetURI key) {
2216                 logger.log(Level.WARNING, "Image insert finished for " + image + ": " + key);
2217                 image.setKey(key.toString());
2218                 deleteTemporaryImage(image.getId());
2219                 saveSone(image.getSone());
2220                 coreListenerManager.fireImageInsertFinished(image);
2221         }
2222
2223         /**
2224          * {@inheritDoc}
2225          */
2226         @Override
2227         public void imageInsertFailed(Image image, Throwable cause) {
2228                 logger.log(Level.WARNING, "Image insert failed for " + image, cause);
2229                 coreListenerManager.fireImageInsertFailed(image, cause);
2230         }
2231
2232         /**
2233          * Convenience interface for external classes that want to access the core’s
2234          * configuration.
2235          *
2236          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
2237          */
2238         public static class Preferences {
2239
2240                 /** The wrapped options. */
2241                 private final Options options;
2242
2243                 /**
2244                  * Creates a new preferences object wrapped around the given options.
2245                  *
2246                  * @param options
2247                  *            The options to wrap
2248                  */
2249                 public Preferences(Options options) {
2250                         this.options = options;
2251                 }
2252
2253                 /**
2254                  * Returns the insertion delay.
2255                  *
2256                  * @return The insertion delay
2257                  */
2258                 public int getInsertionDelay() {
2259                         return options.getIntegerOption("InsertionDelay").get();
2260                 }
2261
2262                 /**
2263                  * Sets the insertion delay
2264                  *
2265                  * @param insertionDelay
2266                  *            The new insertion delay, or {@code null} to restore it to
2267                  *            the default value
2268                  * @return This preferences
2269                  */
2270                 public Preferences setInsertionDelay(Integer insertionDelay) {
2271                         options.getIntegerOption("InsertionDelay").set(insertionDelay);
2272                         return this;
2273                 }
2274
2275                 /**
2276                  * Returns the positive trust.
2277                  *
2278                  * @return The positive trust
2279                  */
2280                 public int getPositiveTrust() {
2281                         return options.getIntegerOption("PositiveTrust").get();
2282                 }
2283
2284                 /**
2285                  * Sets the positive trust.
2286                  *
2287                  * @param positiveTrust
2288                  *            The new positive trust, or {@code null} to restore it to
2289                  *            the default vlaue
2290                  * @return This preferences
2291                  */
2292                 public Preferences setPositiveTrust(Integer positiveTrust) {
2293                         options.getIntegerOption("PositiveTrust").set(positiveTrust);
2294                         return this;
2295                 }
2296
2297                 /**
2298                  * Returns the negative trust.
2299                  *
2300                  * @return The negative trust
2301                  */
2302                 public int getNegativeTrust() {
2303                         return options.getIntegerOption("NegativeTrust").get();
2304                 }
2305
2306                 /**
2307                  * Sets the negative trust.
2308                  *
2309                  * @param negativeTrust
2310                  *            The negative trust, or {@code null} to restore it to the
2311                  *            default value
2312                  * @return The preferences
2313                  */
2314                 public Preferences setNegativeTrust(Integer negativeTrust) {
2315                         options.getIntegerOption("NegativeTrust").set(negativeTrust);
2316                         return this;
2317                 }
2318
2319                 /**
2320                  * Returns the trust comment. This is the comment that is set in the web
2321                  * of trust when a trust value is assigned to an identity.
2322                  *
2323                  * @return The trust comment
2324                  */
2325                 public String getTrustComment() {
2326                         return options.getStringOption("TrustComment").get();
2327                 }
2328
2329                 /**
2330                  * Sets the trust comment.
2331                  *
2332                  * @param trustComment
2333                  *            The trust comment, or {@code null} to restore it to the
2334                  *            default value
2335                  * @return This preferences
2336                  */
2337                 public Preferences setTrustComment(String trustComment) {
2338                         options.getStringOption("TrustComment").set(trustComment);
2339                         return this;
2340                 }
2341
2342                 /**
2343                  * Returns whether the rescue mode is active.
2344                  *
2345                  * @return {@code true} if the rescue mode is active, {@code false}
2346                  *         otherwise
2347                  */
2348                 public boolean isSoneRescueMode() {
2349                         return options.getBooleanOption("SoneRescueMode").get();
2350                 }
2351
2352                 /**
2353                  * Sets whether the rescue mode is active.
2354                  *
2355                  * @param soneRescueMode
2356                  *            {@code true} if the rescue mode is active, {@code false}
2357                  *            otherwise
2358                  * @return This preferences
2359                  */
2360                 public Preferences setSoneRescueMode(Boolean soneRescueMode) {
2361                         options.getBooleanOption("SoneRescueMode").set(soneRescueMode);
2362                         return this;
2363                 }
2364
2365                 /**
2366                  * Returns whether Sone should clear its settings on the next restart.
2367                  * In order to be effective, {@link #isReallyClearOnNextRestart()} needs
2368                  * to return {@code true} as well!
2369                  *
2370                  * @return {@code true} if Sone should clear its settings on the next
2371                  *         restart, {@code false} otherwise
2372                  */
2373                 public boolean isClearOnNextRestart() {
2374                         return options.getBooleanOption("ClearOnNextRestart").get();
2375                 }
2376
2377                 /**
2378                  * Sets whether Sone will clear its settings on the next restart.
2379                  *
2380                  * @param clearOnNextRestart
2381                  *            {@code true} if Sone should clear its settings on the next
2382                  *            restart, {@code false} otherwise
2383                  * @return This preferences
2384                  */
2385                 public Preferences setClearOnNextRestart(Boolean clearOnNextRestart) {
2386                         options.getBooleanOption("ClearOnNextRestart").set(clearOnNextRestart);
2387                         return this;
2388                 }
2389
2390                 /**
2391                  * Returns whether Sone should really clear its settings on next
2392                  * restart. This is a confirmation option that needs to be set in
2393                  * addition to {@link #isClearOnNextRestart()} in order to clear Sone’s
2394                  * settings on the next restart.
2395                  *
2396                  * @return {@code true} if Sone should really clear its settings on the
2397                  *         next restart, {@code false} otherwise
2398                  */
2399                 public boolean isReallyClearOnNextRestart() {
2400                         return options.getBooleanOption("ReallyClearOnNextRestart").get();
2401                 }
2402
2403                 /**
2404                  * Sets whether Sone should really clear its settings on the next
2405                  * restart.
2406                  *
2407                  * @param reallyClearOnNextRestart
2408                  *            {@code true} if Sone should really clear its settings on
2409                  *            the next restart, {@code false} otherwise
2410                  * @return This preferences
2411                  */
2412                 public Preferences setReallyClearOnNextRestart(Boolean reallyClearOnNextRestart) {
2413                         options.getBooleanOption("ReallyClearOnNextRestart").set(reallyClearOnNextRestart);
2414                         return this;
2415                 }
2416
2417         }
2418
2419 }