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