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.Client;
  35 import net.pterodactylus.sone.data.Post;
  36 import net.pterodactylus.sone.data.Profile;
  37 import net.pterodactylus.sone.data.Reply;
  38 import net.pterodactylus.sone.data.Sone;
  39 import net.pterodactylus.sone.freenet.wot.Identity;
  40 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  41 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  42 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  43 import net.pterodactylus.sone.main.SonePlugin;
  44 import net.pterodactylus.util.config.Configuration;
  45 import net.pterodactylus.util.config.ConfigurationException;
  46 import net.pterodactylus.util.logging.Logging;
  47 import net.pterodactylus.util.number.Numbers;
  48 import freenet.keys.FreenetURI;
  49
  50 /**
  51  * The Sone core.
  52  *
  53  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  54  */
  55 public class Core implements IdentityListener {
  56
  57         /**
  58          * Enumeration for the possible states of a {@link Sone}.
  59          *
  60          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  61          */
  62         public enum SoneStatus {
  63
  64                 /** The Sone is unknown, i.e. not yet downloaded. */
  65                 unknown,
  66
  67                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  68                 idle,
  69
  70                 /** The Sone is currently being inserted. */
  71                 inserting,
  72
  73                 /** The Sone is currently being downloaded. */
  74                 downloading,
  75         }
  76
  77         /** The logger. */
  78         private static final Logger logger = Logging.getLogger(Core.class);
  79
  80         /** The options. */
  81         private final Options options = new Options();
  82
  83         /** The core listener manager. */
  84         private final CoreListenerManager coreListenerManager = new CoreListenerManager(this);
  85
  86         /** The configuration. */
  87         private final Configuration configuration;
  88
  89         /** The identity manager. */
  90         private final IdentityManager identityManager;
  91
  92         /** Interface to freenet. */
  93         private final FreenetInterface freenetInterface;
  94
  95         /** The Sone downloader. */
  96         private final SoneDownloader soneDownloader;
  97
  98         /** The Sones’ statuses. */
  99         /* synchronize access on itself. */
 100         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
 101
 102         /** Sone inserters. */
 103         /* synchronize access on this on localSones. */
 104         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 105
 106         /** All local Sones. */
 107         /* synchronize access on this on itself. */
 108         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 109
 110         /** All remote Sones. */
 111         /* synchronize access on this on itself. */
 112         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 113
 114         /** All new Sones. */
 115         private Set<String> newSones = new HashSet<String>();
 116
 117         /** All known Sones. */
 118         /* synchronize access on {@link #newSones}. */
 119         private Set<String> knownSones = new HashSet<String>();
 120
 121         /** All posts. */
 122         private Map<String, Post> posts = new HashMap<String, Post>();
 123
 124         /** All new posts. */
 125         private Set<String> newPosts = new HashSet<String>();
 126
 127         /** All known posts. */
 128         /* synchronize access on {@link #newPosts}. */
 129         private Set<String> knownPosts = new HashSet<String>();
 130
 131         /** All replies. */
 132         private Map<String, Reply> replies = new HashMap<String, Reply>();
 133
 134         /** All new replies. */
 135         private Set<String> newReplies = new HashSet<String>();
 136
 137         /** All known replies. */
 138         private Set<String> knownReplies = new HashSet<String>();
 139
 140         /**
 141          * Creates a new core.
 142          *
 143          * @param configuration
 144          *            The configuration of the core
 145          * @param freenetInterface
 146          *            The freenet interface
 147          * @param identityManager
 148          *            The identity manager
 149          */
 150         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 151                 this.configuration = configuration;
 152                 this.freenetInterface = freenetInterface;
 153                 this.identityManager = identityManager;
 154                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 155         }
 156
 157         //
 158         // LISTENER MANAGEMENT
 159         //
 160
 161         /**
 162          * Adds a new core listener.
 163          *
 164          * @param coreListener
 165          *            The listener to add
 166          */
 167         public void addCoreListener(CoreListener coreListener) {
 168                 coreListenerManager.addListener(coreListener);
 169         }
 170
 171         /**
 172          * Removes a core listener.
 173          *
 174          * @param coreListener
 175          *            The listener to remove
 176          */
 177         public void removeCoreListener(CoreListener coreListener) {
 178                 coreListenerManager.removeListener(coreListener);
 179         }
 180
 181         //
 182         // ACCESSORS
 183         //
 184
 185         /**
 186          * Returns the options used by the core.
 187          *
 188          * @return The options of the core
 189          */
 190         public Options getOptions() {
 191                 return options;
 192         }
 193
 194         /**
 195          * Returns the identity manager used by the core.
 196          *
 197          * @return The identity manager
 198          */
 199         public IdentityManager getIdentityManager() {
 200                 return identityManager;
 201         }
 202
 203         /**
 204          * Returns the status of the given Sone.
 205          *
 206          * @param sone
 207          *            The Sone to get the status for
 208          * @return The status of the Sone
 209          */
 210         public SoneStatus getSoneStatus(Sone sone) {
 211                 synchronized (soneStatuses) {
 212                         return soneStatuses.get(sone);
 213                 }
 214         }
 215
 216         /**
 217          * Sets the status of the given Sone.
 218          *
 219          * @param sone
 220          *            The Sone to set the status of
 221          * @param soneStatus
 222          *            The status to set
 223          */
 224         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 225                 synchronized (soneStatuses) {
 226                         soneStatuses.put(sone, soneStatus);
 227                 }
 228         }
 229
 230         /**
 231          * Returns all Sones, remote and local.
 232          *
 233          * @return All Sones
 234          */
 235         public Set<Sone> getSones() {
 236                 Set<Sone> allSones = new HashSet<Sone>();
 237                 allSones.addAll(getLocalSones());
 238                 allSones.addAll(getRemoteSones());
 239                 return allSones;
 240         }
 241
 242         /**
 243          * Returns the Sone with the given ID, regardless whether it’s local or
 244          * remote.
 245          *
 246          * @param id
 247          *            The ID of the Sone to get
 248          * @return The Sone with the given ID, or {@code null} if there is no such
 249          *         Sone
 250          */
 251         public Sone getSone(String id) {
 252                 return getSone(id, true);
 253         }
 254
 255         /**
 256          * Returns the Sone with the given ID, regardless whether it’s local or
 257          * remote.
 258          *
 259          * @param id
 260          *            The ID of the Sone to get
 261          * @param create
 262          *            {@code true} to create a new Sone if none exists,
 263          *            {@code false} to return {@code null} if a Sone with the given
 264          *            ID does not exist
 265          * @return The Sone with the given ID, or {@code null} if there is no such
 266          *         Sone
 267          */
 268         public Sone getSone(String id, boolean create) {
 269                 if (isLocalSone(id)) {
 270                         return getLocalSone(id);
 271                 }
 272                 return getRemoteSone(id, create);
 273         }
 274
 275         /**
 276          * Checks whether the core knows a Sone with the given ID.
 277          *
 278          * @param id
 279          *            The ID of the Sone
 280          * @return {@code true} if there is a Sone with the given ID, {@code false}
 281          *         otherwise
 282          */
 283         public boolean hasSone(String id) {
 284                 return isLocalSone(id) || isRemoteSone(id);
 285         }
 286
 287         /**
 288          * Returns whether the given Sone is a local Sone.
 289          *
 290          * @param sone
 291          *            The Sone to check for its locality
 292          * @return {@code true} if the given Sone is local, {@code false} otherwise
 293          */
 294         public boolean isLocalSone(Sone sone) {
 295                 synchronized (localSones) {
 296                         return localSones.containsKey(sone.getId());
 297                 }
 298         }
 299
 300         /**
 301          * Returns whether the given ID is the ID of a local Sone.
 302          *
 303          * @param id
 304          *            The Sone ID to check for its locality
 305          * @return {@code true} if the given ID is a local Sone, {@code false}
 306          *         otherwise
 307          */
 308         public boolean isLocalSone(String id) {
 309                 synchronized (localSones) {
 310                         return localSones.containsKey(id);
 311                 }
 312         }
 313
 314         /**
 315          * Returns all local Sones.
 316          *
 317          * @return All local Sones
 318          */
 319         public Set<Sone> getLocalSones() {
 320                 synchronized (localSones) {
 321                         return new HashSet<Sone>(localSones.values());
 322                 }
 323         }
 324
 325         /**
 326          * Returns the local Sone with the given ID.
 327          *
 328          * @param id
 329          *            The ID of the Sone to get
 330          * @return The Sone with the given ID
 331          */
 332         public Sone getLocalSone(String id) {
 333                 return getLocalSone(id, true);
 334         }
 335
 336         /**
 337          * Returns the local Sone with the given ID, optionally creating a new Sone.
 338          *
 339          * @param id
 340          *            The ID of the Sone
 341          * @param create
 342          *            {@code true} to create a new Sone if none exists,
 343          *            {@code false} to return null if none exists
 344          * @return The Sone with the given ID, or {@code null}
 345          */
 346         public Sone getLocalSone(String id, boolean create) {
 347                 synchronized (localSones) {
 348                         Sone sone = localSones.get(id);
 349                         if ((sone == null) && create) {
 350                                 sone = new Sone(id);
 351                                 localSones.put(id, sone);
 352                         }
 353                         return sone;
 354                 }
 355         }
 356
 357         /**
 358          * Returns all remote Sones.
 359          *
 360          * @return All remote Sones
 361          */
 362         public Set<Sone> getRemoteSones() {
 363                 synchronized (remoteSones) {
 364                         return new HashSet<Sone>(remoteSones.values());
 365                 }
 366         }
 367
 368         /**
 369          * Returns the remote Sone with the given ID.
 370          *
 371          * @param id
 372          *            The ID of the remote Sone to get
 373          * @return The Sone with the given ID
 374          */
 375         public Sone getRemoteSone(String id) {
 376                 return getRemoteSone(id, true);
 377         }
 378
 379         /**
 380          * Returns the remote Sone with the given ID.
 381          *
 382          * @param id
 383          *            The ID of the remote Sone to get
 384          * @param create
 385          *            {@code true} to always create a Sone, {@code false} to return
 386          *            {@code null} if no Sone with the given ID exists
 387          * @return The Sone with the given ID
 388          */
 389         public Sone getRemoteSone(String id, boolean create) {
 390                 synchronized (remoteSones) {
 391                         Sone sone = remoteSones.get(id);
 392                         if ((sone == null) && create) {
 393                                 sone = new Sone(id);
 394                                 remoteSones.put(id, sone);
 395                         }
 396                         return sone;
 397                 }
 398         }
 399
 400         /**
 401          * Returns whether the given Sone is a remote Sone.
 402          *
 403          * @param sone
 404          *            The Sone to check
 405          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 406          *         otherwise
 407          */
 408         public boolean isRemoteSone(Sone sone) {
 409                 synchronized (remoteSones) {
 410                         return remoteSones.containsKey(sone.getId());
 411                 }
 412         }
 413
 414         /**
 415          * Returns whether the Sone with the given ID is a remote Sone.
 416          *
 417          * @param id
 418          *            The ID of the Sone to check
 419          * @return {@code true} if the Sone with the given ID is a remote Sone,
 420          *         {@code false} otherwise
 421          */
 422         public boolean isRemoteSone(String id) {
 423                 synchronized (remoteSones) {
 424                         return remoteSones.containsKey(id);
 425                 }
 426         }
 427
 428         /**
 429          * Returns whether the given Sone is a new Sone. After this check, the Sone
 430          * is marked as known, i.e. a second call with the same parameters will
 431          * always yield {@code false}.
 432          *
 433          * @param sone
 434          *            The sone to check for
 435          * @return {@code true} if the given Sone is new, false otherwise
 436          */
 437         public boolean isNewSone(Sone sone) {
 438                 synchronized (newSones) {
 439                         boolean isNew = !knownSones.contains(sone.getId()) && newSones.remove(sone.getId());
 440                         knownSones.add(sone.getId());
 441                         return isNew;
 442                 }
 443         }
 444
 445         /**
 446          * Returns whether the given Sone has been modified.
 447          *
 448          * @param sone
 449          *            The Sone to check for modifications
 450          * @return {@code true} if a modification has been detected in the Sone,
 451          *         {@code false} otherwise
 452          */
 453         public boolean isModifiedSone(Sone sone) {
 454                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 455         }
 456
 457         /**
 458          * Returns the post with the given ID.
 459          *
 460          * @param postId
 461          *            The ID of the post to get
 462          * @return The post, or {@code null} if there is no such post
 463          */
 464         public Post getPost(String postId) {
 465                 synchronized (posts) {
 466                         Post post = posts.get(postId);
 467                         if (post == null) {
 468                                 post = new Post(postId);
 469                                 posts.put(postId, post);
 470                         }
 471                         return post;
 472                 }
 473         }
 474
 475         /**
 476          * Returns whether the given post ID is new. After this method returns it is
 477          * marked a known post ID.
 478          *
 479          * @param postId
 480          *            The post ID
 481          * @return {@code true} if the post is considered to be new, {@code false}
 482          *         otherwise
 483          */
 484         public boolean isNewPost(String postId) {
 485                 synchronized (newPosts) {
 486                         boolean isNew = !knownPosts.contains(postId) && newPosts.remove(postId);
 487                         knownPosts.add(postId);
 488                         return isNew;
 489                 }
 490         }
 491
 492         /**
 493          * Returns the reply with the given ID.
 494          *
 495          * @param replyId
 496          *            The ID of the reply to get
 497          * @return The reply, or {@code null} if there is no such reply
 498          */
 499         public Reply getReply(String replyId) {
 500                 synchronized (replies) {
 501                         Reply reply = replies.get(replyId);
 502                         if (reply == null) {
 503                                 reply = new Reply(replyId);
 504                                 replies.put(replyId, reply);
 505                         }
 506                         return reply;
 507                 }
 508         }
 509
 510         /**
 511          * Returns all replies for the given post, order ascending by time.
 512          *
 513          * @param post
 514          *            The post to get all replies for
 515          * @return All replies for the given post
 516          */
 517         public List<Reply> getReplies(Post post) {
 518                 Set<Sone> sones = getSones();
 519                 List<Reply> replies = new ArrayList<Reply>();
 520                 for (Sone sone : sones) {
 521                         for (Reply reply : sone.getReplies()) {
 522                                 if (reply.getPost().equals(post)) {
 523                                         replies.add(reply);
 524                                 }
 525                         }
 526                 }
 527                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 528                 return replies;
 529         }
 530
 531         /**
 532          * Returns whether the reply with the given ID is new.
 533          *
 534          * @param replyId
 535          *            The ID of the reply to check
 536          * @return {@code true} if the reply is considered to be new, {@code false}
 537          *         otherwise
 538          */
 539         public boolean isNewReply(String replyId) {
 540                 synchronized (newReplies) {
 541                         boolean isNew = !knownReplies.contains(replyId) && newReplies.remove(replyId);
 542                         knownReplies.add(replyId);
 543                         return isNew;
 544                 }
 545         }
 546
 547         /**
 548          * Returns all Sones that have liked the given post.
 549          *
 550          * @param post
 551          *            The post to get the liking Sones for
 552          * @return The Sones that like the given post
 553          */
 554         public Set<Sone> getLikes(Post post) {
 555                 Set<Sone> sones = new HashSet<Sone>();
 556                 for (Sone sone : getSones()) {
 557                         if (sone.getLikedPostIds().contains(post.getId())) {
 558                                 sones.add(sone);
 559                         }
 560                 }
 561                 return sones;
 562         }
 563
 564         /**
 565          * Returns all Sones that have liked the given reply.
 566          *
 567          * @param reply
 568          *            The reply to get the liking Sones for
 569          * @return The Sones that like the given reply
 570          */
 571         public Set<Sone> getLikes(Reply reply) {
 572                 Set<Sone> sones = new HashSet<Sone>();
 573                 for (Sone sone : getSones()) {
 574                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 575                                 sones.add(sone);
 576                         }
 577                 }
 578                 return sones;
 579         }
 580
 581         //
 582         // ACTIONS
 583         //
 584
 585         /**
 586          * Adds a local Sone from the given ID which has to be the ID of an own
 587          * identity.
 588          *
 589          * @param id
 590          *            The ID of an own identity to add a Sone for
 591          * @return The added (or already existing) Sone
 592          */
 593         public Sone addLocalSone(String id) {
 594                 synchronized (localSones) {
 595                         if (localSones.containsKey(id)) {
 596                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 597                                 return localSones.get(id);
 598                         }
 599                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 600                         if (ownIdentity == null) {
 601                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 602                                 return null;
 603                         }
 604                         return addLocalSone(ownIdentity);
 605                 }
 606         }
 607
 608         /**
 609          * Adds a local Sone from the given own identity.
 610          *
 611          * @param ownIdentity
 612          *            The own identity to create a Sone from
 613          * @return The added (or already existing) Sone
 614          */
 615         public Sone addLocalSone(OwnIdentity ownIdentity) {
 616                 if (ownIdentity == null) {
 617                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 618                         return null;
 619                 }
 620                 synchronized (localSones) {
 621                         final Sone sone;
 622                         try {
 623                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 624                         } catch (MalformedURLException mue1) {
 625                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 626                                 return null;
 627                         }
 628                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 629                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 630                         /* TODO - load posts ’n stuff */
 631                         localSones.put(ownIdentity.getId(), sone);
 632                         SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 633                         soneInserters.put(sone, soneInserter);
 634                         setSoneStatus(sone, SoneStatus.idle);
 635                         loadSone(sone);
 636                         soneInserter.start();
 637                         new Thread(new Runnable() {
 638
 639                                 @Override
 640                                 @SuppressWarnings("synthetic-access")
 641                                 public void run() {
 642                                         soneDownloader.fetchSone(sone);
 643                                 }
 644
 645                         }, "Sone Downloader").start();
 646                         return sone;
 647                 }
 648         }
 649
 650         /**
 651          * Creates a new Sone for the given own identity.
 652          *
 653          * @param ownIdentity
 654          *            The own identity to create a Sone for
 655          * @return The created Sone
 656          */
 657         public Sone createSone(OwnIdentity ownIdentity) {
 658                 identityManager.addContext(ownIdentity, "Sone");
 659                 Sone sone = addLocalSone(ownIdentity);
 660                 return sone;
 661         }
 662
 663         /**
 664          * Adds the Sone of the given identity.
 665          *
 666          * @param identity
 667          *            The identity whose Sone to add
 668          * @return The added or already existing Sone
 669          */
 670         public Sone addRemoteSone(Identity identity) {
 671                 if (identity == null) {
 672                         logger.log(Level.WARNING, "Given Identity is null!");
 673                         return null;
 674                 }
 675                 synchronized (remoteSones) {
 676                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 677                         boolean newSone = sone.getRequestUri() == null;
 678                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 679                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 680                         if (newSone) {
 681                                 synchronized (newSones) {
 682                                         newSone = !knownSones.contains(sone.getId());
 683                                         if (newSone) {
 684                                                 newSones.add(sone.getId());
 685                                         }
 686                                 }
 687                                 if (newSone) {
 688                                         coreListenerManager.fireNewSoneFound(sone);
 689                                 }
 690                         }
 691                         remoteSones.put(identity.getId(), sone);
 692                         soneDownloader.addSone(sone);
 693                         setSoneStatus(sone, SoneStatus.unknown);
 694                         new Thread(new Runnable() {
 695
 696                                 @Override
 697                                 @SuppressWarnings("synthetic-access")
 698                                 public void run() {
 699                                         soneDownloader.fetchSone(sone);
 700                                 }
 701
 702                         }, "Sone Downloader").start();
 703                         return sone;
 704                 }
 705         }
 706
 707         /**
 708          * Updates the stores Sone with the given Sone.
 709          *
 710          * @param sone
 711          *            The updated Sone
 712          */
 713         public void updateSone(Sone sone) {
 714                 if (hasSone(sone.getId())) {
 715                         Sone storedSone = getSone(sone.getId());
 716                         if (!(sone.getTime() > storedSone.getTime())) {
 717                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
 718                                 return;
 719                         }
 720                         synchronized (posts) {
 721                                 for (Post post : storedSone.getPosts()) {
 722                                         posts.remove(post.getId());
 723                                 }
 724                                 synchronized (newPosts) {
 725                                         for (Post post : sone.getPosts()) {
 726                                                 if (!storedSone.getPosts().contains(post) && !knownSones.contains(post.getId())) {
 727                                                         newPosts.add(post.getId());
 728                                                 }
 729                                                 posts.put(post.getId(), post);
 730                                         }
 731                                 }
 732                         }
 733                         synchronized (replies) {
 734                                 for (Reply reply : storedSone.getReplies()) {
 735                                         replies.remove(reply.getId());
 736                                 }
 737                                 synchronized (newReplies) {
 738                                         for (Reply reply : sone.getReplies()) {
 739                                                 if (!storedSone.getReplies().contains(reply) && !knownSones.contains(reply.getId())) {
 740                                                         newReplies.add(reply.getId());
 741                                                 }
 742                                                 replies.put(reply.getId(), reply);
 743                                         }
 744                                 }
 745                         }
 746                         synchronized (storedSone) {
 747                                 storedSone.setTime(sone.getTime());
 748                                 storedSone.setClient(sone.getClient());
 749                                 storedSone.setProfile(sone.getProfile());
 750                                 storedSone.setPosts(sone.getPosts());
 751                                 storedSone.setReplies(sone.getReplies());
 752                                 storedSone.setLikePostIds(sone.getLikedPostIds());
 753                                 storedSone.setLikeReplyIds(sone.getLikedReplyIds());
 754                                 storedSone.setLatestEdition(sone.getRequestUri().getEdition());
 755                         }
 756                 }
 757         }
 758
 759         /**
 760          * Deletes the given Sone. This will remove the Sone from the
 761          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
 762          * and remove the context from its identity.
 763          *
 764          * @param sone
 765          *            The Sone to delete
 766          */
 767         public void deleteSone(Sone sone) {
 768                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 769                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
 770                         return;
 771                 }
 772                 synchronized (localSones) {
 773                         if (!localSones.containsKey(sone.getId())) {
 774                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
 775                                 return;
 776                         }
 777                         localSones.remove(sone.getId());
 778                         soneInserters.remove(sone).stop();
 779                 }
 780                 identityManager.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 781                 identityManager.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 782                 try {
 783                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 784                 } catch (ConfigurationException ce1) {
 785                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 786                 }
 787         }
 788
 789         /**
 790          * Loads and updates the given Sone from the configuration. If any error is
 791          * encountered, loading is aborted and the given Sone is not changed.
 792          *
 793          * @param sone
 794          *            The Sone to load and update
 795          */
 796         public void loadSone(Sone sone) {
 797                 if (!isLocalSone(sone)) {
 798                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
 799                         return;
 800                 }
 801
 802                 /* load Sone. */
 803                 String sonePrefix = "Sone/" + sone.getId();
 804                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 805                 if (soneTime == null) {
 806                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 807                         return;
 808                 }
 809                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 810
 811                 /* load profile. */
 812                 Profile profile = new Profile();
 813                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
 814                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
 815                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
 816                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
 817                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
 818                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
 819
 820                 /* load posts. */
 821                 Set<Post> posts = new HashSet<Post>();
 822                 while (true) {
 823                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
 824                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
 825                         if (postId == null) {
 826                                 break;
 827                         }
 828                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
 829                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
 830                         if ((postTime == 0) || (postText == null)) {
 831                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
 832                                 return;
 833                         }
 834                         posts.add(getPost(postId).setSone(sone).setTime(postTime).setText(postText));
 835                 }
 836
 837                 /* load replies. */
 838                 Set<Reply> replies = new HashSet<Reply>();
 839                 while (true) {
 840                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
 841                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
 842                         if (replyId == null) {
 843                                 break;
 844                         }
 845                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
 846                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
 847                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
 848                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
 849                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 850                                 return;
 851                         }
 852                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
 853                 }
 854
 855                 /* load post likes. */
 856                 Set<String> likedPostIds = new HashSet<String>();
 857                 while (true) {
 858                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
 859                         if (likedPostId == null) {
 860                                 break;
 861                         }
 862                         likedPostIds.add(likedPostId);
 863                 }
 864
 865                 /* load reply likes. */
 866                 Set<String> likedReplyIds = new HashSet<String>();
 867                 while (true) {
 868                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
 869                         if (likedReplyId == null) {
 870                                 break;
 871                         }
 872                         likedReplyIds.add(likedReplyId);
 873                 }
 874
 875                 /* load friends. */
 876                 Set<String> friends = new HashSet<String>();
 877                 while (true) {
 878                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
 879                         if (friendId == null) {
 880                                 break;
 881                         }
 882                         friends.add(friendId);
 883                 }
 884
 885                 /* if we’re still here, Sone was loaded successfully. */
 886                 synchronized (sone) {
 887                         sone.setTime(soneTime);
 888                         sone.setProfile(profile);
 889                         sone.setPosts(posts);
 890                         sone.setReplies(replies);
 891                         sone.setLikePostIds(likedPostIds);
 892                         sone.setLikeReplyIds(likedReplyIds);
 893                         sone.setFriends(friends);
 894                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
 895                 }
 896                 synchronized (newSones) {
 897                         for (String friend : friends) {
 898                                 knownSones.add(friend);
 899                         }
 900                 }
 901                 synchronized (newPosts) {
 902                         for (Post post : posts) {
 903                                 knownPosts.add(post.getId());
 904                         }
 905                 }
 906                 synchronized (newReplies) {
 907                         for (Reply reply : replies) {
 908                                 knownReplies.add(reply.getId());
 909                         }
 910                 }
 911         }
 912
 913         /**
 914          * Saves the given Sone. This will persist all local settings for the given
 915          * Sone, such as the friends list and similar, private options.
 916          *
 917          * @param sone
 918          *            The Sone to save
 919          */
 920         public void saveSone(Sone sone) {
 921                 if (!isLocalSone(sone)) {
 922                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
 923                         return;
 924                 }
 925                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 926                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
 927                         return;
 928                 }
 929
 930                 logger.log(Level.INFO, "Saving Sone: %s", sone);
 931                 identityManager.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
 932                 try {
 933                         /* save Sone into configuration. */
 934                         String sonePrefix = "Sone/" + sone.getId();
 935                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 936                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
 937
 938                         /* save profile. */
 939                         Profile profile = sone.getProfile();
 940                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 941                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 942                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 943                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 944                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 945                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 946
 947                         /* save posts. */
 948                         int postCounter = 0;
 949                         for (Post post : sone.getPosts()) {
 950                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 951                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 952                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 953                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 954                         }
 955                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 956
 957                         /* save replies. */
 958                         int replyCounter = 0;
 959                         for (Reply reply : sone.getReplies()) {
 960                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 961                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 962                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
 963                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 964                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 965                         }
 966                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 967
 968                         /* save post likes. */
 969                         int postLikeCounter = 0;
 970                         for (String postId : sone.getLikedPostIds()) {
 971                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 972                         }
 973                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 974
 975                         /* save reply likes. */
 976                         int replyLikeCounter = 0;
 977                         for (String replyId : sone.getLikedReplyIds()) {
 978                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 979                         }
 980                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 981
 982                         /* save friends. */
 983                         int friendCounter = 0;
 984                         for (String friendId : sone.getFriends()) {
 985                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
 986                         }
 987                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
 988
 989                         logger.log(Level.INFO, "Sone %s saved.", sone);
 990                 } catch (ConfigurationException ce1) {
 991                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
 992                 }
 993         }
 994
 995         /**
 996          * Creates a new post.
 997          *
 998          * @param sone
 999          *            The Sone that creates the post
1000          * @param text
1001          *            The text of the post
1002          */
1003         public void createPost(Sone sone, String text) {
1004                 createPost(sone, System.currentTimeMillis(), text);
1005         }
1006
1007         /**
1008          * Creates a new post.
1009          *
1010          * @param sone
1011          *            The Sone that creates the post
1012          * @param time
1013          *            The time of the post
1014          * @param text
1015          *            The text of the post
1016          */
1017         public void createPost(Sone sone, long time, String text) {
1018                 if (!isLocalSone(sone)) {
1019                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
1020                         return;
1021                 }
1022                 Post post = new Post(sone, time, text);
1023                 synchronized (posts) {
1024                         posts.put(post.getId(), post);
1025                 }
1026                 synchronized (newPosts) {
1027                         knownPosts.add(post.getId());
1028                 }
1029                 sone.addPost(post);
1030                 saveSone(sone);
1031         }
1032
1033         /**
1034          * Deletes the given post.
1035          *
1036          * @param post
1037          *            The post to delete
1038          */
1039         public void deletePost(Post post) {
1040                 if (!isLocalSone(post.getSone())) {
1041                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
1042                         return;
1043                 }
1044                 post.getSone().removePost(post);
1045                 synchronized (posts) {
1046                         posts.remove(post.getId());
1047                 }
1048                 saveSone(post.getSone());
1049         }
1050
1051         /**
1052          * Creates a new reply.
1053          *
1054          * @param sone
1055          *            The Sone that creates the reply
1056          * @param post
1057          *            The post that this reply refers to
1058          * @param text
1059          *            The text of the reply
1060          * @return The created reply
1061          */
1062         public Reply createReply(Sone sone, Post post, String text) {
1063                 return createReply(sone, post, System.currentTimeMillis(), text);
1064         }
1065
1066         /**
1067          * Creates a new reply.
1068          *
1069          * @param sone
1070          *            The Sone that creates the reply
1071          * @param post
1072          *            The post that this reply refers to
1073          * @param time
1074          *            The time of the reply
1075          * @param text
1076          *            The text of the reply
1077          * @return The created reply
1078          */
1079         public Reply createReply(Sone sone, Post post, long time, String text) {
1080                 if (!isLocalSone(sone)) {
1081                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
1082                         return null;
1083                 }
1084                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
1085                 synchronized (replies) {
1086                         replies.put(reply.getId(), reply);
1087                 }
1088                 synchronized (newReplies) {
1089                         knownReplies.add(reply.getId());
1090                 }
1091                 sone.addReply(reply);
1092                 saveSone(sone);
1093                 return reply;
1094         }
1095
1096         /**
1097          * Deletes the given reply.
1098          *
1099          * @param reply
1100          *            The reply to delete
1101          */
1102         public void deleteReply(Reply reply) {
1103                 Sone sone = reply.getSone();
1104                 if (!isLocalSone(sone)) {
1105                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
1106                         return;
1107                 }
1108                 synchronized (replies) {
1109                         replies.remove(reply.getId());
1110                 }
1111                 sone.removeReply(reply);
1112                 saveSone(sone);
1113         }
1114
1115         /**
1116          * Starts the core.
1117          */
1118         public void start() {
1119                 loadConfiguration();
1120         }
1121
1122         /**
1123          * Stops the core.
1124          */
1125         public void stop() {
1126                 synchronized (localSones) {
1127                         for (SoneInserter soneInserter : soneInserters.values()) {
1128                                 soneInserter.stop();
1129                         }
1130                 }
1131                 saveConfiguration();
1132         }
1133
1134         //
1135         // PRIVATE METHODS
1136         //
1137
1138         /**
1139          * Loads the configuration.
1140          */
1141         @SuppressWarnings("unchecked")
1142         private void loadConfiguration() {
1143                 /* create options. */
1144                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
1145
1146                         @Override
1147                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1148                                 SoneInserter.setInsertionDelay(newValue);
1149                         }
1150
1151                 }));
1152                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
1153                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
1154
1155                 /* read options from configuration. */
1156                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
1157                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
1158                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
1159                 options.getBooleanOption("ClearOnNextRestart").set(null);
1160                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
1161                 if (clearConfiguration) {
1162                         /* stop loading the configuration. */
1163                         return;
1164                 }
1165
1166                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
1167
1168                 /* load known Sones. */
1169                 int soneCounter = 0;
1170                 while (true) {
1171                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1172                         if (knownSoneId == null) {
1173                                 break;
1174                         }
1175                         synchronized (newSones) {
1176                                 knownSones.add(knownSoneId);
1177                         }
1178                 }
1179
1180                 /* load known posts. */
1181                 int postCounter = 0;
1182                 while (true) {
1183                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
1184                         if (knownPostId == null) {
1185                                 break;
1186                         }
1187                         synchronized (newPosts) {
1188                                 knownPosts.add(knownPostId);
1189                         }
1190                 }
1191
1192                 /* load known replies. */
1193                 int replyCounter = 0;
1194                 while (true) {
1195                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
1196                         if (knownReplyId == null) {
1197                                 break;
1198                         }
1199                         synchronized (newReplies) {
1200                                 knownReplies.add(knownReplyId);
1201                         }
1202                 }
1203
1204         }
1205
1206         /**
1207          * Saves the current options.
1208          */
1209         private void saveConfiguration() {
1210                 /* store the options first. */
1211                 try {
1212                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1213                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1214                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1215
1216                         /* save known Sones. */
1217                         int soneCounter = 0;
1218                         synchronized (newSones) {
1219                                 for (String knownSoneId : knownSones) {
1220                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1221                                 }
1222                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1223                         }
1224
1225                         /* save known posts. */
1226                         int postCounter = 0;
1227                         synchronized (newPosts) {
1228                                 for (String knownPostId : knownPosts) {
1229                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
1230                                 }
1231                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
1232                         }
1233
1234                         /* save known replies. */
1235                         int replyCounter = 0;
1236                         synchronized (newReplies) {
1237                                 for (String knownReplyId : knownReplies) {
1238                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
1239                                 }
1240                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1241                         }
1242
1243                 } catch (ConfigurationException ce1) {
1244                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1245                 }
1246         }
1247
1248         /**
1249          * Generate a Sone URI from the given URI and latest edition.
1250          *
1251          * @param uriString
1252          *            The URI to derive the Sone URI from
1253          * @return The derived URI
1254          */
1255         private FreenetURI getSoneUri(String uriString) {
1256                 try {
1257                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
1258                         return uri;
1259                 } catch (MalformedURLException mue1) {
1260                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
1261                         return null;
1262                 }
1263         }
1264
1265         //
1266         // INTERFACE IdentityListener
1267         //
1268
1269         /**
1270          * {@inheritDoc}
1271          */
1272         @Override
1273         public void ownIdentityAdded(OwnIdentity ownIdentity) {
1274                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
1275                 if (ownIdentity.hasContext("Sone")) {
1276                         addLocalSone(ownIdentity);
1277                 }
1278         }
1279
1280         /**
1281          * {@inheritDoc}
1282          */
1283         @Override
1284         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
1285                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
1286         }
1287
1288         /**
1289          * {@inheritDoc}
1290          */
1291         @Override
1292         public void identityAdded(Identity identity) {
1293                 logger.log(Level.FINEST, "Adding Identity: " + identity);
1294                 addRemoteSone(identity);
1295         }
1296
1297         /**
1298          * {@inheritDoc}
1299          */
1300         @Override
1301         public void identityUpdated(final Identity identity) {
1302                 new Thread(new Runnable() {
1303
1304                         @Override
1305                         @SuppressWarnings("synthetic-access")
1306                         public void run() {
1307                                 Sone sone = getRemoteSone(identity.getId());
1308                                 soneDownloader.fetchSone(sone);
1309                         }
1310                 }).start();
1311         }
1312
1313         /**
1314          * {@inheritDoc}
1315          */
1316         @Override
1317         public void identityRemoved(Identity identity) {
1318                 /* TODO */
1319         }
1320
1321 }