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