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.Post;
  35 import net.pterodactylus.sone.data.Profile;
  36 import net.pterodactylus.sone.data.Reply;
  37 import net.pterodactylus.sone.data.Sone;
  38 import net.pterodactylus.sone.freenet.wot.Identity;
  39 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  40 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  41 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  42 import net.pterodactylus.util.config.Configuration;
  43 import net.pterodactylus.util.config.ConfigurationException;
  44 import net.pterodactylus.util.logging.Logging;
  45 import net.pterodactylus.util.number.Numbers;
  46 import freenet.keys.FreenetURI;
  47
  48 /**
  49  * The Sone core.
  50  *
  51  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  52  */
  53 public class Core implements IdentityListener {
  54
  55         /**
  56          * Enumeration for the possible states of a {@link Sone}.
  57          *
  58          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  59          */
  60         public enum SoneStatus {
  61
  62                 /** The Sone is unknown, i.e. not yet downloaded. */
  63                 unknown,
  64
  65                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  66                 idle,
  67
  68                 /** The Sone is currently being inserted. */
  69                 inserting,
  70
  71                 /** The Sone is currently being downloaded. */
  72                 downloading,
  73         }
  74
  75         /** The logger. */
  76         private static final Logger logger = Logging.getLogger(Core.class);
  77
  78         /** The options. */
  79         private final Options options = new Options();
  80
  81         /** The configuration. */
  82         private final Configuration configuration;
  83
  84         /** The identity manager. */
  85         private final IdentityManager identityManager;
  86
  87         /** Interface to freenet. */
  88         private final FreenetInterface freenetInterface;
  89
  90         /** The Sone downloader. */
  91         private final SoneDownloader soneDownloader;
  92
  93         /** The Sones’ statuses. */
  94         /* synchronize access on itself. */
  95         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
  96
  97         /** Sone inserters. */
  98         /* synchronize access on this on localSones. */
  99         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 100
 101         /** All local Sones. */
 102         /* synchronize access on this on itself. */
 103         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 104
 105         /** All remote Sones. */
 106         /* synchronize access on this on itself. */
 107         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 108
 109         /** All new Sones. */
 110         private Set<Sone> newSones = new HashSet<Sone>();
 111
 112         /** All known Sones. */
 113         /* synchronize access on {@link #newSones}. */
 114         private Set<Sone> knownSones = new HashSet<Sone>();
 115
 116         /** All posts. */
 117         private Map<String, Post> posts = new HashMap<String, Post>();
 118
 119         /** All replies. */
 120         private Map<String, Reply> replies = new HashMap<String, Reply>();
 121
 122         /**
 123          * Creates a new core.
 124          *
 125          * @param configuration
 126          *            The configuration of the core
 127          * @param freenetInterface
 128          *            The freenet interface
 129          * @param identityManager
 130          *            The identity manager
 131          */
 132         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 133                 this.configuration = configuration;
 134                 this.freenetInterface = freenetInterface;
 135                 this.identityManager = identityManager;
 136                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 137         }
 138
 139         //
 140         // ACCESSORS
 141         //
 142
 143         /**
 144          * Returns the options used by the core.
 145          *
 146          * @return The options of the core
 147          */
 148         public Options getOptions() {
 149                 return options;
 150         }
 151
 152         /**
 153          * Returns the identity manager used by the core.
 154          *
 155          * @return The identity manager
 156          */
 157         public IdentityManager getIdentityManager() {
 158                 return identityManager;
 159         }
 160
 161         /**
 162          * Returns the status of the given Sone.
 163          *
 164          * @param sone
 165          *            The Sone to get the status for
 166          * @return The status of the Sone
 167          */
 168         public SoneStatus getSoneStatus(Sone sone) {
 169                 synchronized (soneStatuses) {
 170                         return soneStatuses.get(sone);
 171                 }
 172         }
 173
 174         /**
 175          * Sets the status of the given Sone.
 176          *
 177          * @param sone
 178          *            The Sone to set the status of
 179          * @param soneStatus
 180          *            The status to set
 181          */
 182         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 183                 synchronized (soneStatuses) {
 184                         soneStatuses.put(sone, soneStatus);
 185                 }
 186         }
 187
 188         /**
 189          * Returns all Sones, remote and local.
 190          *
 191          * @return All Sones
 192          */
 193         public Set<Sone> getSones() {
 194                 Set<Sone> allSones = new HashSet<Sone>();
 195                 allSones.addAll(getLocalSones());
 196                 allSones.addAll(getRemoteSones());
 197                 return allSones;
 198         }
 199
 200         /**
 201          * Returns the Sone with the given ID, regardless whether it’s local or
 202          * remote.
 203          *
 204          * @param id
 205          *            The ID of the Sone to get
 206          * @return The Sone with the given ID, or {@code null} if there is no such
 207          *         Sone
 208          */
 209         public Sone getSone(String id) {
 210                 return getSone(id, true);
 211         }
 212
 213         /**
 214          * Returns the Sone with the given ID, regardless whether it’s local or
 215          * remote.
 216          *
 217          * @param id
 218          *            The ID of the Sone to get
 219          * @param create
 220          *            {@code true} to create a new Sone if none exists,
 221          *            {@code false} to return {@code null} if a Sone with the given
 222          *            ID does not exist
 223          * @return The Sone with the given ID, or {@code null} if there is no such
 224          *         Sone
 225          */
 226         public Sone getSone(String id, boolean create) {
 227                 if (isLocalSone(id)) {
 228                         return getLocalSone(id);
 229                 }
 230                 return getRemoteSone(id, create);
 231         }
 232
 233         /**
 234          * Returns whether the given Sone is a local Sone.
 235          *
 236          * @param sone
 237          *            The Sone to check for its locality
 238          * @return {@code true} if the given Sone is local, {@code false} otherwise
 239          */
 240         public boolean isLocalSone(Sone sone) {
 241                 synchronized (localSones) {
 242                         return localSones.containsKey(sone.getId());
 243                 }
 244         }
 245
 246         /**
 247          * Returns whether the given ID is the ID of a local Sone.
 248          *
 249          * @param id
 250          *            The Sone ID to check for its locality
 251          * @return {@code true} if the given ID is a local Sone, {@code false}
 252          *         otherwise
 253          */
 254         public boolean isLocalSone(String id) {
 255                 synchronized (localSones) {
 256                         return localSones.containsKey(id);
 257                 }
 258         }
 259
 260         /**
 261          * Returns all local Sones.
 262          *
 263          * @return All local Sones
 264          */
 265         public Set<Sone> getLocalSones() {
 266                 synchronized (localSones) {
 267                         return new HashSet<Sone>(localSones.values());
 268                 }
 269         }
 270
 271         /**
 272          * Returns the local Sone with the given ID.
 273          *
 274          * @param id
 275          *            The ID of the Sone to get
 276          * @return The Sone with the given ID
 277          */
 278         public Sone getLocalSone(String id) {
 279                 synchronized (localSones) {
 280                         Sone sone = localSones.get(id);
 281                         if (sone == null) {
 282                                 sone = new Sone(id);
 283                                 localSones.put(id, sone);
 284                         }
 285                         return sone;
 286                 }
 287         }
 288
 289         /**
 290          * Returns all remote Sones.
 291          *
 292          * @return All remote Sones
 293          */
 294         public Set<Sone> getRemoteSones() {
 295                 synchronized (remoteSones) {
 296                         return new HashSet<Sone>(remoteSones.values());
 297                 }
 298         }
 299
 300         /**
 301          * Returns the remote Sone with the given ID.
 302          *
 303          * @param id
 304          *            The ID of the remote Sone to get
 305          * @return The Sone with the given ID
 306          */
 307         public Sone getRemoteSone(String id) {
 308                 return getRemoteSone(id, true);
 309         }
 310
 311         /**
 312          * Returns the remote Sone with the given ID.
 313          *
 314          * @param id
 315          *            The ID of the remote Sone to get
 316          * @param create
 317          *            {@code true} to always create a Sone, {@code false} to return
 318          *            {@code null} if no Sone with the given ID exists
 319          * @return The Sone with the given ID
 320          */
 321         public Sone getRemoteSone(String id, boolean create) {
 322                 synchronized (remoteSones) {
 323                         Sone sone = remoteSones.get(id);
 324                         if ((sone == null) && create) {
 325                                 sone = new Sone(id);
 326                                 remoteSones.put(id, sone);
 327                         }
 328                         return sone;
 329                 }
 330         }
 331
 332         /**
 333          * Returns whether the given Sone is a remote Sone.
 334          *
 335          * @param sone
 336          *            The Sone to check
 337          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 338          *         otherwise
 339          */
 340         public boolean isRemoteSone(Sone sone) {
 341                 synchronized (remoteSones) {
 342                         return remoteSones.containsKey(sone.getId());
 343                 }
 344         }
 345
 346         /**
 347          * Returns whether the Sone with the given ID is a remote Sone.
 348          *
 349          * @param id
 350          *            The ID of the Sone to check
 351          * @return {@code true} if the Sone with the given ID is a remote Sone,
 352          *         {@code false} otherwise
 353          */
 354         public boolean isRemoteSone(String id) {
 355                 synchronized (remoteSones) {
 356                         return remoteSones.containsKey(id);
 357                 }
 358         }
 359
 360         /**
 361          * Returns whether the given Sone is a new Sone. After this check, the Sone
 362          * is marked as known, i.e. a second call with the same parameters will
 363          * always yield {@code false}.
 364          *
 365          * @param sone
 366          *            The sone to check for
 367          * @return {@code true} if the given Sone is new, false otherwise
 368          */
 369         public boolean isNewSone(Sone sone) {
 370                 synchronized (newSones) {
 371                         boolean isNew = !knownSones.contains(sone) && newSones.remove(sone);
 372                         knownSones.add(sone);
 373                         return isNew;
 374                 }
 375         }
 376
 377         /**
 378          * Returns the post with the given ID.
 379          *
 380          * @param postId
 381          *            The ID of the post to get
 382          * @return The post, or {@code null} if there is no such post
 383          */
 384         public Post getPost(String postId) {
 385                 synchronized (posts) {
 386                         Post post = posts.get(postId);
 387                         if (post == null) {
 388                                 post = new Post(postId);
 389                                 posts.put(postId, post);
 390                         }
 391                         return post;
 392                 }
 393         }
 394
 395         /**
 396          * Returns the reply with the given ID.
 397          *
 398          * @param replyId
 399          *            The ID of the reply to get
 400          * @return The reply, or {@code null} if there is no such reply
 401          */
 402         public Reply getReply(String replyId) {
 403                 synchronized (replies) {
 404                         Reply reply = replies.get(replyId);
 405                         if (reply == null) {
 406                                 reply = new Reply(replyId);
 407                                 replies.put(replyId, reply);
 408                         }
 409                         return reply;
 410                 }
 411         }
 412
 413         /**
 414          * Returns all replies for the given post, order ascending by time.
 415          *
 416          * @param post
 417          *            The post to get all replies for
 418          * @return All replies for the given post
 419          */
 420         public List<Reply> getReplies(Post post) {
 421                 Set<Sone> sones = getSones();
 422                 List<Reply> replies = new ArrayList<Reply>();
 423                 for (Sone sone : sones) {
 424                         for (Reply reply : sone.getReplies()) {
 425                                 if (reply.getPost().equals(post)) {
 426                                         replies.add(reply);
 427                                 }
 428                         }
 429                 }
 430                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 431                 return replies;
 432         }
 433
 434         /**
 435          * Returns all Sones that have liked the given post.
 436          *
 437          * @param post
 438          *            The post to get the liking Sones for
 439          * @return The Sones that like the given post
 440          */
 441         public Set<Sone> getLikes(Post post) {
 442                 Set<Sone> sones = new HashSet<Sone>();
 443                 for (Sone sone : getSones()) {
 444                         if (sone.getLikedPostIds().contains(post.getId())) {
 445                                 sones.add(sone);
 446                         }
 447                 }
 448                 return sones;
 449         }
 450
 451         /**
 452          * Returns all Sones that have liked the given reply.
 453          *
 454          * @param reply
 455          *            The reply to get the liking Sones for
 456          * @return The Sones that like the given reply
 457          */
 458         public Set<Sone> getLikes(Reply reply) {
 459                 Set<Sone> sones = new HashSet<Sone>();
 460                 for (Sone sone : getSones()) {
 461                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 462                                 sones.add(sone);
 463                         }
 464                 }
 465                 return sones;
 466         }
 467
 468         //
 469         // ACTIONS
 470         //
 471
 472         /**
 473          * Adds a local Sone from the given ID which has to be the ID of an own
 474          * identity.
 475          *
 476          * @param id
 477          *            The ID of an own identity to add a Sone for
 478          * @return The added (or already existing) Sone
 479          */
 480         public Sone addLocalSone(String id) {
 481                 synchronized (localSones) {
 482                         if (localSones.containsKey(id)) {
 483                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 484                                 return localSones.get(id);
 485                         }
 486                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 487                         if (ownIdentity == null) {
 488                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 489                                 return null;
 490                         }
 491                         return addLocalSone(ownIdentity);
 492                 }
 493         }
 494
 495         /**
 496          * Adds a local Sone from the given own identity.
 497          *
 498          * @param ownIdentity
 499          *            The own identity to create a Sone from
 500          * @return The added (or already existing) Sone
 501          */
 502         public Sone addLocalSone(OwnIdentity ownIdentity) {
 503                 if (ownIdentity == null) {
 504                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 505                         return null;
 506                 }
 507                 synchronized (localSones) {
 508                         final Sone sone;
 509                         try {
 510                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 511                                 sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 512                         } catch (MalformedURLException mue1) {
 513                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 514                                 return null;
 515                         }
 516                         /* TODO - load posts ’n stuff */
 517                         localSones.put(ownIdentity.getId(), sone);
 518                         SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 519                         soneInserters.put(sone, soneInserter);
 520                         soneInserter.start();
 521                         setSoneStatus(sone, SoneStatus.idle);
 522                         loadSone(sone);
 523                         new Thread(new Runnable() {
 524
 525                                 @Override
 526                                 @SuppressWarnings("synthetic-access")
 527                                 public void run() {
 528                                         soneDownloader.fetchSone(sone);
 529                                 }
 530
 531                         }, "Sone Downloader").start();
 532                         return sone;
 533                 }
 534         }
 535
 536         /**
 537          * Creates a new Sone for the given own identity.
 538          *
 539          * @param ownIdentity
 540          *            The own identity to create a Sone for
 541          * @return The created Sone
 542          */
 543         public Sone createSone(OwnIdentity ownIdentity) {
 544                 identityManager.addContext(ownIdentity, "Sone");
 545                 Sone sone = addLocalSone(ownIdentity);
 546                 synchronized (sone) {
 547                         /* mark as modified so that it gets inserted immediately. */
 548                         sone.setModificationCounter(sone.getModificationCounter() + 1);
 549                 }
 550                 return sone;
 551         }
 552
 553         /**
 554          * Adds the Sone of the given identity.
 555          *
 556          * @param identity
 557          *            The identity whose Sone to add
 558          * @return The added or already existing Sone
 559          */
 560         public Sone addRemoteSone(Identity identity) {
 561                 if (identity == null) {
 562                         logger.log(Level.WARNING, "Given Identity is null!");
 563                         return null;
 564                 }
 565                 synchronized (remoteSones) {
 566                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 567                         boolean newSone = sone.getRequestUri() == null;
 568                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 569                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 570                         if (newSone) {
 571                                 synchronized (newSones) {
 572                                         newSones.add(sone);
 573                                 }
 574                         }
 575                         remoteSones.put(identity.getId(), sone);
 576                         soneDownloader.addSone(sone);
 577                         setSoneStatus(sone, SoneStatus.unknown);
 578                         new Thread(new Runnable() {
 579
 580                                 @Override
 581                                 @SuppressWarnings("synthetic-access")
 582                                 public void run() {
 583                                         soneDownloader.fetchSone(sone);
 584                                 }
 585
 586                         }, "Sone Downloader").start();
 587                         return sone;
 588                 }
 589         }
 590
 591         /**
 592          * Updates the stores Sone with the given Sone.
 593          *
 594          * @param sone
 595          *            The updated Sone
 596          */
 597         public void updateSone(Sone sone) {
 598                 if (isRemoteSone(sone)) {
 599                         Sone storedSone = getRemoteSone(sone.getId());
 600                         if (!(sone.getTime() > storedSone.getTime())) {
 601                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
 602                                 return;
 603                         }
 604                         synchronized (posts) {
 605                                 for (Post post : storedSone.getPosts()) {
 606                                         posts.remove(post.getId());
 607                                 }
 608                                 for (Post post : sone.getPosts()) {
 609                                         posts.put(post.getId(), post);
 610                                 }
 611                         }
 612                         synchronized (replies) {
 613                                 for (Reply reply : storedSone.getReplies()) {
 614                                         replies.remove(reply.getId());
 615                                 }
 616                                 for (Reply reply : sone.getReplies()) {
 617                                         replies.put(reply.getId(), reply);
 618                                 }
 619                         }
 620                         synchronized (storedSone) {
 621                                 storedSone.setTime(sone.getTime());
 622                                 storedSone.setProfile(sone.getProfile());
 623                                 storedSone.setPosts(sone.getPosts());
 624                                 storedSone.setReplies(sone.getReplies());
 625                                 storedSone.setLikePostIds(sone.getLikedPostIds());
 626                                 storedSone.setLikeReplyIds(sone.getLikedReplyIds());
 627                                 storedSone.setLatestEdition(sone.getRequestUri().getEdition());
 628                                 storedSone.setModificationCounter(0);
 629                         }
 630                 }
 631         }
 632
 633         /**
 634          * Deletes the given Sone. This will remove the Sone from the
 635          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
 636          * and remove the context from its identity.
 637          *
 638          * @param sone
 639          *            The Sone to delete
 640          */
 641         public void deleteSone(Sone sone) {
 642                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 643                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
 644                         return;
 645                 }
 646                 synchronized (localSones) {
 647                         if (!localSones.containsKey(sone.getId())) {
 648                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
 649                                 return;
 650                         }
 651                         localSones.remove(sone.getId());
 652                         soneInserters.remove(sone).stop();
 653                 }
 654                 identityManager.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 655                 identityManager.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 656                 try {
 657                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 658                 } catch (ConfigurationException ce1) {
 659                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 660                 }
 661         }
 662
 663         /**
 664          * Loads and updates the given Sone from the configuration. If any error is
 665          * encountered, loading is aborted and the given Sone is not changed.
 666          *
 667          * @param sone
 668          *            The Sone to load and update
 669          */
 670         public void loadSone(Sone sone) {
 671                 if (!isLocalSone(sone)) {
 672                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
 673                         return;
 674                 }
 675
 676                 /* load Sone. */
 677                 String sonePrefix = "Sone/" + sone.getId();
 678                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 679                 if (soneTime == null) {
 680                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 681                         return;
 682                 }
 683                 long soneModificationCounter = configuration.getLongValue(sonePrefix + "/ModificationCounter").getValue((long) 0);
 684
 685                 /* load profile. */
 686                 Profile profile = new Profile();
 687                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
 688                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
 689                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
 690                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
 691                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
 692                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
 693
 694                 /* load posts. */
 695                 Set<Post> posts = new HashSet<Post>();
 696                 while (true) {
 697                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
 698                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
 699                         if (postId == null) {
 700                                 break;
 701                         }
 702                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
 703                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
 704                         if ((postTime == 0) || (postText == null)) {
 705                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
 706                                 return;
 707                         }
 708                         posts.add(getPost(postId).setSone(sone).setTime(postTime).setText(postText));
 709                 }
 710
 711                 /* load replies. */
 712                 Set<Reply> replies = new HashSet<Reply>();
 713                 while (true) {
 714                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
 715                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
 716                         if (replyId == null) {
 717                                 break;
 718                         }
 719                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
 720                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
 721                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
 722                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
 723                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 724                                 return;
 725                         }
 726                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
 727                 }
 728
 729                 /* load post likes. */
 730                 Set<String> likedPostIds = new HashSet<String>();
 731                 while (true) {
 732                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
 733                         if (likedPostId == null) {
 734                                 break;
 735                         }
 736                         likedPostIds.add(likedPostId);
 737                 }
 738
 739                 /* load reply likes. */
 740                 Set<String> likedReplyIds = new HashSet<String>();
 741                 while (true) {
 742                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
 743                         if (likedReplyId == null) {
 744                                 break;
 745                         }
 746                         likedReplyIds.add(likedReplyId);
 747                 }
 748
 749                 /* load friends. */
 750                 Set<Sone> friends = new HashSet<Sone>();
 751                 while (true) {
 752                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
 753                         if (friendId == null) {
 754                                 break;
 755                         }
 756                         Boolean friendLocal = configuration.getBooleanValue(sonePrefix + "/Friends/" + friends.size() + "/Local").getValue(null);
 757                         if (friendLocal == null) {
 758                                 logger.log(Level.WARNING, "Invalid friend found, aborting load!");
 759                                 return;
 760                         }
 761                         friends.add(friendLocal ? getLocalSone(friendId) : getRemoteSone(friendId));
 762                 }
 763
 764                 /* if we’re still here, Sone was loaded successfully. */
 765                 synchronized (sone) {
 766                         sone.setTime(soneTime);
 767                         sone.setProfile(profile);
 768                         sone.setPosts(posts);
 769                         sone.setReplies(replies);
 770                         sone.setLikePostIds(likedPostIds);
 771                         sone.setLikeReplyIds(likedReplyIds);
 772                         sone.setFriends(friends);
 773                         sone.setModificationCounter(soneModificationCounter);
 774                 }
 775                 synchronized (newSones) {
 776                         for (Sone friend : friends) {
 777                                 knownSones.add(friend);
 778                         }
 779                 }
 780         }
 781
 782         /**
 783          * Saves the given Sone. This will persist all local settings for the given
 784          * Sone, such as the friends list and similar, private options.
 785          *
 786          * @param sone
 787          *            The Sone to save
 788          */
 789         public void saveSone(Sone sone) {
 790                 if (!isLocalSone(sone)) {
 791                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
 792                         return;
 793                 }
 794                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 795                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
 796                         return;
 797                 }
 798
 799                 logger.log(Level.INFO, "Saving Sone: %s", sone);
 800                 identityManager.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
 801                 try {
 802                         /* save Sone into configuration. */
 803                         String sonePrefix = "Sone/" + sone.getId();
 804                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 805                         configuration.getLongValue(sonePrefix + "/ModificationCounter").setValue(sone.getModificationCounter());
 806
 807                         /* save profile. */
 808                         Profile profile = sone.getProfile();
 809                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 810                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 811                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 812                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 813                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 814                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 815
 816                         /* save posts. */
 817                         int postCounter = 0;
 818                         for (Post post : sone.getPosts()) {
 819                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 820                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 821                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 822                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 823                         }
 824                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 825
 826                         /* save replies. */
 827                         int replyCounter = 0;
 828                         for (Reply reply : sone.getReplies()) {
 829                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 830                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 831                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
 832                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 833                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 834                         }
 835                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 836
 837                         /* save post likes. */
 838                         int postLikeCounter = 0;
 839                         for (String postId : sone.getLikedPostIds()) {
 840                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 841                         }
 842                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 843
 844                         /* save reply likes. */
 845                         int replyLikeCounter = 0;
 846                         for (String replyId : sone.getLikedReplyIds()) {
 847                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 848                         }
 849                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 850
 851                         /* save friends. */
 852                         int friendCounter = 0;
 853                         for (Sone friend : sone.getFriends()) {
 854                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(friend.getId());
 855                                 configuration.getBooleanValue(sonePrefix + "/Friends/" + friendCounter++ + "/Local").setValue(friend.getInsertUri() != null);
 856                         }
 857                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
 858
 859                         logger.log(Level.INFO, "Sone %s saved.", sone);
 860                 } catch (ConfigurationException ce1) {
 861                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
 862                 }
 863         }
 864
 865         /**
 866          * Creates a new post.
 867          *
 868          * @param sone
 869          *            The Sone that creates the post
 870          * @param text
 871          *            The text of the post
 872          */
 873         public void createPost(Sone sone, String text) {
 874                 createPost(sone, System.currentTimeMillis(), text);
 875         }
 876
 877         /**
 878          * Creates a new post.
 879          *
 880          * @param sone
 881          *            The Sone that creates the post
 882          * @param time
 883          *            The time of the post
 884          * @param text
 885          *            The text of the post
 886          */
 887         public void createPost(Sone sone, long time, String text) {
 888                 if (!isLocalSone(sone)) {
 889                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
 890                         return;
 891                 }
 892                 Post post = new Post(sone, time, text);
 893                 synchronized (posts) {
 894                         posts.put(post.getId(), post);
 895                 }
 896                 sone.addPost(post);
 897                 saveSone(sone);
 898         }
 899
 900         /**
 901          * Deletes the given post.
 902          *
 903          * @param post
 904          *            The post to delete
 905          */
 906         public void deletePost(Post post) {
 907                 if (!isLocalSone(post.getSone())) {
 908                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
 909                         return;
 910                 }
 911                 post.getSone().removePost(post);
 912                 synchronized (posts) {
 913                         posts.remove(post.getId());
 914                 }
 915                 saveSone(post.getSone());
 916         }
 917
 918         /**
 919          * Creates a new reply.
 920          *
 921          * @param sone
 922          *            The Sone that creates the reply
 923          * @param post
 924          *            The post that this reply refers to
 925          * @param text
 926          *            The text of the reply
 927          */
 928         public void createReply(Sone sone, Post post, String text) {
 929                 createReply(sone, post, System.currentTimeMillis(), text);
 930         }
 931
 932         /**
 933          * Creates a new reply.
 934          *
 935          * @param sone
 936          *            The Sone that creates the reply
 937          * @param post
 938          *            The post that this reply refers to
 939          * @param time
 940          *            The time of the reply
 941          * @param text
 942          *            The text of the reply
 943          */
 944         public void createReply(Sone sone, Post post, long time, String text) {
 945                 if (!isLocalSone(sone)) {
 946                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
 947                         return;
 948                 }
 949                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
 950                 synchronized (replies) {
 951                         replies.put(reply.getId(), reply);
 952                 }
 953                 sone.addReply(reply);
 954                 saveSone(sone);
 955         }
 956
 957         /**
 958          * Deletes the given reply.
 959          *
 960          * @param reply
 961          *            The reply to delete
 962          */
 963         public void deleteReply(Reply reply) {
 964                 Sone sone = reply.getSone();
 965                 if (!isLocalSone(sone)) {
 966                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
 967                         return;
 968                 }
 969                 synchronized (replies) {
 970                         replies.remove(reply.getId());
 971                 }
 972                 sone.removeReply(reply);
 973                 saveSone(sone);
 974         }
 975
 976         /**
 977          * Starts the core.
 978          */
 979         public void start() {
 980                 loadConfiguration();
 981         }
 982
 983         /**
 984          * Stops the core.
 985          */
 986         public void stop() {
 987                 synchronized (localSones) {
 988                         for (SoneInserter soneInserter : soneInserters.values()) {
 989                                 soneInserter.stop();
 990                         }
 991                 }
 992                 saveConfiguration();
 993         }
 994
 995         //
 996         // PRIVATE METHODS
 997         //
 998
 999         /**
1000          * Loads the configuration.
1001          */
1002         @SuppressWarnings("unchecked")
1003         private void loadConfiguration() {
1004                 /* create options. */
1005                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
1006
1007                         @Override
1008                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1009                                 SoneInserter.setInsertionDelay(newValue);
1010                         }
1011
1012                 }));
1013                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
1014                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
1015
1016                 /* read options from configuration. */
1017                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
1018                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
1019                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
1020                 options.getBooleanOption("ClearOnNextRestart").set(null);
1021                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
1022                 if (clearConfiguration) {
1023                         /* stop loading the configuration. */
1024                         return;
1025                 }
1026
1027                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
1028
1029                 /* load known Sones. */
1030                 int soneCounter = 0;
1031                 while (true) {
1032                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1033                         if (knownSoneId == null) {
1034                                 break;
1035                         }
1036                         synchronized (newSones) {
1037                                 knownSones.add(getRemoteSone(knownSoneId));
1038                         }
1039                 }
1040         }
1041
1042         /**
1043          * Saves the current options.
1044          */
1045         private void saveConfiguration() {
1046                 /* store the options first. */
1047                 try {
1048                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1049                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1050                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1051
1052                         /* save known Sones. */
1053                         int soneCounter = 0;
1054                         synchronized (newSones) {
1055                                 for (Sone knownSone : knownSones) {
1056                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSone.getId());
1057                                 }
1058                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1059                         }
1060
1061                 } catch (ConfigurationException ce1) {
1062                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1063                 }
1064         }
1065
1066         /**
1067          * Generate a Sone URI from the given URI and latest edition.
1068          *
1069          * @param uriString
1070          *            The URI to derive the Sone URI from
1071          * @return The derived URI
1072          */
1073         private FreenetURI getSoneUri(String uriString) {
1074                 try {
1075                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
1076                         return uri;
1077                 } catch (MalformedURLException mue1) {
1078                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
1079                         return null;
1080                 }
1081         }
1082
1083         //
1084         // INTERFACE IdentityListener
1085         //
1086
1087         /**
1088          * {@inheritDoc}
1089          */
1090         @Override
1091         public void ownIdentityAdded(OwnIdentity ownIdentity) {
1092                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
1093                 if (ownIdentity.hasContext("Sone")) {
1094                         addLocalSone(ownIdentity);
1095                 }
1096         }
1097
1098         /**
1099          * {@inheritDoc}
1100          */
1101         @Override
1102         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
1103                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
1104         }
1105
1106         /**
1107          * {@inheritDoc}
1108          */
1109         @Override
1110         public void identityAdded(Identity identity) {
1111                 logger.log(Level.FINEST, "Adding Identity: " + identity);
1112                 addRemoteSone(identity);
1113         }
1114
1115         /**
1116          * {@inheritDoc}
1117          */
1118         @Override
1119         public void identityUpdated(final Identity identity) {
1120                 new Thread(new Runnable() {
1121
1122                         @Override
1123                         @SuppressWarnings("synthetic-access")
1124                         public void run() {
1125                                 Sone sone = getRemoteSone(identity.getId());
1126                                 soneDownloader.fetchSone(sone);
1127                         }
1128                 }).start();
1129         }
1130
1131         /**
1132          * {@inheritDoc}
1133          */
1134         @Override
1135         public void identityRemoved(Identity identity) {
1136                 /* TODO */
1137         }
1138
1139 }