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