src/main/java/net/pterodactylus/sone/core/Core.java

   1 /*
   2  * Sone - Core.java - Copyright © 2010 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.core;
  19
  20 import java.net.MalformedURLException;
  21 import java.util.ArrayList;
  22 import java.util.Collections;
  23 import java.util.HashMap;
  24 import java.util.HashSet;
  25 import java.util.List;
  26 import java.util.Map;
  27 import java.util.Set;
  28 import java.util.logging.Level;
  29 import java.util.logging.Logger;
  30
  31 import net.pterodactylus.sone.core.Options.DefaultOption;
  32 import net.pterodactylus.sone.core.Options.Option;
  33 import net.pterodactylus.sone.core.Options.OptionWatcher;
  34 import net.pterodactylus.sone.data.Post;
  35 import net.pterodactylus.sone.data.Profile;
  36 import net.pterodactylus.sone.data.Reply;
  37 import net.pterodactylus.sone.data.Sone;
  38 import net.pterodactylus.sone.freenet.wot.Identity;
  39 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  40 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  41 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  42 import net.pterodactylus.util.config.Configuration;
  43 import net.pterodactylus.util.config.ConfigurationException;
  44 import net.pterodactylus.util.logging.Logging;
  45 import net.pterodactylus.util.number.Numbers;
  46 import freenet.keys.FreenetURI;
  47
  48 /**
  49  * The Sone core.
  50  *
  51  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  52  */
  53 public class Core implements IdentityListener {
  54
  55         /**
  56          * Enumeration for the possible states of a {@link Sone}.
  57          *
  58          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  59          */
  60         public enum SoneStatus {
  61
  62                 /** The Sone is unknown, i.e. not yet downloaded. */
  63                 unknown,
  64
  65                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  66                 idle,
  67
  68                 /** The Sone is currently being inserted. */
  69                 inserting,
  70
  71                 /** The Sone is currently being downloaded. */
  72                 downloading,
  73         }
  74
  75         /** The logger. */
  76         private static final Logger logger = Logging.getLogger(Core.class);
  77
  78         /** The options. */
  79         private final Options options = new Options();
  80
  81         /** The configuration. */
  82         private final Configuration configuration;
  83
  84         /** The identity manager. */
  85         private final IdentityManager identityManager;
  86
  87         /** Interface to freenet. */
  88         private final FreenetInterface freenetInterface;
  89
  90         /** The Sone downloader. */
  91         private final SoneDownloader soneDownloader;
  92
  93         /** The Sones’ statuses. */
  94         /* synchronize access on itself. */
  95         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
  96
  97         /** Sone inserters. */
  98         /* synchronize access on this on localSones. */
  99         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 100
 101         /** All local Sones. */
 102         /* synchronize access on this on itself. */
 103         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 104
 105         /** All remote Sones. */
 106         /* synchronize access on this on itself. */
 107         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 108
 109         /** All new Sones. */
 110         private Set<Sone> newSones = new HashSet<Sone>();
 111
 112         /** All known Sones. */
 113         /* synchronize access on {@link #newSones}. */
 114         private Set<Sone> knownSones = new HashSet<Sone>();
 115
 116         /** All posts. */
 117         private Map<String, Post> posts = new HashMap<String, Post>();
 118
 119         /** All replies. */
 120         private Map<String, Reply> replies = new HashMap<String, Reply>();
 121
 122         /**
 123          * Creates a new core.
 124          *
 125          * @param configuration
 126          *            The configuration of the core
 127          * @param freenetInterface
 128          *            The freenet interface
 129          * @param identityManager
 130          *            The identity manager
 131          */
 132         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 133                 this.configuration = configuration;
 134                 this.freenetInterface = freenetInterface;
 135                 this.identityManager = identityManager;
 136                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 137         }
 138
 139         //
 140         // ACCESSORS
 141         //
 142
 143         /**
 144          * Returns the options used by the core.
 145          *
 146          * @return The options of the core
 147          */
 148         public Options getOptions() {
 149                 return options;
 150         }
 151
 152         /**
 153          * Returns the identity manager used by the core.
 154          *
 155          * @return The identity manager
 156          */
 157         public IdentityManager getIdentityManager() {
 158                 return identityManager;
 159         }
 160
 161         /**
 162          * Returns the status of the given Sone.
 163          *
 164          * @param sone
 165          *            The Sone to get the status for
 166          * @return The status of the Sone
 167          */
 168         public SoneStatus getSoneStatus(Sone sone) {
 169                 synchronized (soneStatuses) {
 170                         return soneStatuses.get(sone);
 171                 }
 172         }
 173
 174         /**
 175          * Sets the status of the given Sone.
 176          *
 177          * @param sone
 178          *            The Sone to set the status of
 179          * @param soneStatus
 180          *            The status to set
 181          */
 182         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 183                 synchronized (soneStatuses) {
 184                         soneStatuses.put(sone, soneStatus);
 185                 }
 186         }
 187
 188         /**
 189          * Returns all Sones, remote and local.
 190          *
 191          * @return All Sones
 192          */
 193         public Set<Sone> getSones() {
 194                 Set<Sone> allSones = new HashSet<Sone>();
 195                 allSones.addAll(getLocalSones());
 196                 allSones.addAll(getRemoteSones());
 197                 return allSones;
 198         }
 199
 200         /**
 201          * Returns the Sone with the given ID, regardless whether it’s local or
 202          * remote.
 203          *
 204          * @param id
 205          *            The ID of the Sone to get
 206          * @return The Sone with the given ID, or {@code null} if there is no such
 207          *         Sone
 208          */
 209         public Sone getSone(String id) {
 210                 if (isLocalSone(id)) {
 211                         return getLocalSone(id);
 212                 }
 213                 return getRemoteSone(id);
 214         }
 215
 216         /**
 217          * Returns whether the given Sone is a local Sone.
 218          *
 219          * @param sone
 220          *            The Sone to check for its locality
 221          * @return {@code true} if the given Sone is local, {@code false} otherwise
 222          */
 223         public boolean isLocalSone(Sone sone) {
 224                 synchronized (localSones) {
 225                         return localSones.containsKey(sone.getId());
 226                 }
 227         }
 228
 229         /**
 230          * Returns whether the given ID is the ID of a local Sone.
 231          *
 232          * @param id
 233          *            The Sone ID to check for its locality
 234          * @return {@code true} if the given ID is a local Sone, {@code false}
 235          *         otherwise
 236          */
 237         public boolean isLocalSone(String id) {
 238                 synchronized (localSones) {
 239                         return localSones.containsKey(id);
 240                 }
 241         }
 242
 243         /**
 244          * Returns all local Sones.
 245          *
 246          * @return All local Sones
 247          */
 248         public Set<Sone> getLocalSones() {
 249                 synchronized (localSones) {
 250                         return new HashSet<Sone>(localSones.values());
 251                 }
 252         }
 253
 254         /**
 255          * Returns the local Sone with the given ID.
 256          *
 257          * @param id
 258          *            The ID of the Sone to get
 259          * @return The Sone with the given ID
 260          */
 261         public Sone getLocalSone(String id) {
 262                 synchronized (localSones) {
 263                         Sone sone = localSones.get(id);
 264                         if (sone == null) {
 265                                 sone = new Sone(id);
 266                                 localSones.put(id, sone);
 267                         }
 268                         return sone;
 269                 }
 270         }
 271
 272         /**
 273          * Returns all remote Sones.
 274          *
 275          * @return All remote Sones
 276          */
 277         public Set<Sone> getRemoteSones() {
 278                 synchronized (remoteSones) {
 279                         return new HashSet<Sone>(remoteSones.values());
 280                 }
 281         }
 282
 283         /**
 284          * Returns the remote Sone with the given ID.
 285          *
 286          * @param id
 287          *            The ID of the remote Sone to get
 288          * @return The Sone with the given ID
 289          */
 290         public Sone getRemoteSone(String id) {
 291                 synchronized (remoteSones) {
 292                         Sone sone = remoteSones.get(id);
 293                         if (sone == null) {
 294                                 sone = new Sone(id);
 295                                 remoteSones.put(id, sone);
 296                         }
 297                         return sone;
 298                 }
 299         }
 300
 301         /**
 302          * Returns whether the given Sone is a remote Sone.
 303          *
 304          * @param sone
 305          *            The Sone to check
 306          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 307          *         otherwise
 308          */
 309         public boolean isRemoteSone(Sone sone) {
 310                 synchronized (remoteSones) {
 311                         return remoteSones.containsKey(sone.getId());
 312                 }
 313         }
 314
 315         /**
 316          * Returns whether the Sone with the given ID is a remote Sone.
 317          *
 318          * @param id
 319          *            The ID of the Sone to check
 320          * @return {@code true} if the Sone with the given ID is a remote Sone,
 321          *         {@code false} otherwise
 322          */
 323         public boolean isRemoteSone(String id) {
 324                 synchronized (remoteSones) {
 325                         return remoteSones.containsKey(id);
 326                 }
 327         }
 328
 329         /**
 330          * Returns whether the given Sone is a new Sone. After this check, the Sone
 331          * is marked as known, i.e. a second call with the same parameters will
 332          * always yield {@code false}.
 333          *
 334          * @param sone
 335          *            The sone to check for
 336          * @return {@code true} if the given Sone is new, false otherwise
 337          */
 338         public boolean isNewSone(Sone sone) {
 339                 synchronized (newSones) {
 340                         boolean isNew = !knownSones.contains(sone) && newSones.remove(sone);
 341                         knownSones.add(sone);
 342                         return isNew;
 343                 }
 344         }
 345
 346         /**
 347          * Returns the post with the given ID.
 348          *
 349          * @param postId
 350          *            The ID of the post to get
 351          * @return The post, or {@code null} if there is no such post
 352          */
 353         public Post getPost(String postId) {
 354                 synchronized (posts) {
 355                         Post post = posts.get(postId);
 356                         if (post == null) {
 357                                 post = new Post(postId);
 358                                 posts.put(postId, post);
 359                         }
 360                         return post;
 361                 }
 362         }
 363
 364         /**
 365          * Returns the reply with the given ID.
 366          *
 367          * @param replyId
 368          *            The ID of the reply to get
 369          * @return The reply, or {@code null} if there is no such reply
 370          */
 371         public Reply getReply(String replyId) {
 372                 synchronized (replies) {
 373                         Reply reply = replies.get(replyId);
 374                         if (reply == null) {
 375                                 reply = new Reply(replyId);
 376                                 replies.put(replyId, reply);
 377                         }
 378                         return reply;
 379                 }
 380         }
 381
 382         /**
 383          * Returns all replies for the given post, order ascending by time.
 384          *
 385          * @param post
 386          *            The post to get all replies for
 387          * @return All replies for the given post
 388          */
 389         public List<Reply> getReplies(Post post) {
 390                 Set<Sone> sones = getSones();
 391                 List<Reply> replies = new ArrayList<Reply>();
 392                 for (Sone sone : sones) {
 393                         for (Reply reply : sone.getReplies()) {
 394                                 if (reply.getPost().equals(post)) {
 395                                         replies.add(reply);
 396                                 }
 397                         }
 398                 }
 399                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 400                 return replies;
 401         }
 402
 403         /**
 404          * Returns all Sones that have liked the given post.
 405          *
 406          * @param post
 407          *            The post to get the liking Sones for
 408          * @return The Sones that like the given post
 409          */
 410         public Set<Sone> getLikes(Post post) {
 411                 Set<Sone> sones = new HashSet<Sone>();
 412                 for (Sone sone : getSones()) {
 413                         if (sone.getLikedPostIds().contains(post.getId())) {
 414                                 sones.add(sone);
 415                         }
 416                 }
 417                 return sones;
 418         }
 419
 420         /**
 421          * Returns all Sones that have liked the given reply.
 422          *
 423          * @param reply
 424          *            The reply to get the liking Sones for
 425          * @return The Sones that like the given reply
 426          */
 427         public Set<Sone> getLikes(Reply reply) {
 428                 Set<Sone> sones = new HashSet<Sone>();
 429                 for (Sone sone : getSones()) {
 430                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 431                                 sones.add(sone);
 432                         }
 433                 }
 434                 return sones;
 435         }
 436
 437         //
 438         // ACTIONS
 439         //
 440
 441         /**
 442          * Adds a local Sone from the given ID which has to be the ID of an own
 443          * identity.
 444          *
 445          * @param id
 446          *            The ID of an own identity to add a Sone for
 447          * @return The added (or already existing) Sone
 448          */
 449         public Sone addLocalSone(String id) {
 450                 synchronized (localSones) {
 451                         if (localSones.containsKey(id)) {
 452                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 453                                 return localSones.get(id);
 454                         }
 455                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 456                         if (ownIdentity == null) {
 457                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 458                                 return null;
 459                         }
 460                         return addLocalSone(ownIdentity);
 461                 }
 462         }
 463
 464         /**
 465          * Adds a local Sone from the given own identity.
 466          *
 467          * @param ownIdentity
 468          *            The own identity to create a Sone from
 469          * @return The added (or already existing) Sone
 470          */
 471         public Sone addLocalSone(OwnIdentity ownIdentity) {
 472                 if (ownIdentity == null) {
 473                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 474                         return null;
 475                 }
 476                 synchronized (localSones) {
 477                         final Sone sone;
 478                         try {
 479                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 480                                 sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 481                         } catch (MalformedURLException mue1) {
 482                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 483                                 return null;
 484                         }
 485                         /* TODO - load posts ’n stuff */
 486                         localSones.put(ownIdentity.getId(), sone);
 487                         SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 488                         soneInserters.put(sone, soneInserter);
 489                         soneInserter.start();
 490                         setSoneStatus(sone, SoneStatus.idle);
 491                         loadSone(sone);
 492                         new Thread(new Runnable() {
 493
 494                                 @Override
 495                                 @SuppressWarnings("synthetic-access")
 496                                 public void run() {
 497                                         soneDownloader.fetchSone(sone);
 498                                 }
 499
 500                         }, "Sone Downloader").start();
 501                         return sone;
 502                 }
 503         }
 504
 505         /**
 506          * Creates a new Sone for the given own identity.
 507          *
 508          * @param ownIdentity
 509          *            The own identity to create a Sone for
 510          * @return The created Sone
 511          */
 512         public Sone createSone(OwnIdentity ownIdentity) {
 513                 identityManager.addContext(ownIdentity, "Sone");
 514                 Sone sone = addLocalSone(ownIdentity);
 515                 synchronized (sone) {
 516                         /* mark as modified so that it gets inserted immediately. */
 517                         sone.setModificationCounter(sone.getModificationCounter() + 1);
 518                 }
 519                 return sone;
 520         }
 521
 522         /**
 523          * Adds the Sone of the given identity.
 524          *
 525          * @param identity
 526          *            The identity whose Sone to add
 527          * @return The added or already existing Sone
 528          */
 529         public Sone addRemoteSone(Identity identity) {
 530                 if (identity == null) {
 531                         logger.log(Level.WARNING, "Given Identity is null!");
 532                         return null;
 533                 }
 534                 synchronized (remoteSones) {
 535                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 536                         boolean newSone = sone.getRequestUri() == null;
 537                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 538                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 539                         if (newSone) {
 540                                 synchronized (newSones) {
 541                                         newSones.add(sone);
 542                                 }
 543                         }
 544                         remoteSones.put(identity.getId(), sone);
 545                         soneDownloader.addSone(sone);
 546                         setSoneStatus(sone, SoneStatus.unknown);
 547                         new Thread(new Runnable() {
 548
 549                                 @Override
 550                                 @SuppressWarnings("synthetic-access")
 551                                 public void run() {
 552                                         soneDownloader.fetchSone(sone);
 553                                 }
 554
 555                         }, "Sone Downloader").start();
 556                         return sone;
 557                 }
 558         }
 559
 560         /**
 561          * Updates the stores Sone with the given Sone.
 562          *
 563          * @param sone
 564          *            The updated Sone
 565          */
 566         public void updateSone(Sone sone) {
 567                 if (isRemoteSone(sone)) {
 568                         Sone storedSone = getRemoteSone(sone.getId());
 569                         if (!(sone.getTime() > storedSone.getTime())) {
 570                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
 571                                 return;
 572                         }
 573                         synchronized (posts) {
 574                                 for (Post post : storedSone.getPosts()) {
 575                                         posts.remove(post.getId());
 576                                 }
 577                                 for (Post post : sone.getPosts()) {
 578                                         posts.put(post.getId(), post);
 579                                 }
 580                         }
 581                         synchronized (replies) {
 582                                 for (Reply reply : storedSone.getReplies()) {
 583                                         replies.remove(reply.getId());
 584                                 }
 585                                 for (Reply reply : sone.getReplies()) {
 586                                         replies.put(reply.getId(), reply);
 587                                 }
 588                         }
 589                         synchronized (storedSone) {
 590                                 storedSone.setTime(sone.getTime());
 591                                 storedSone.setProfile(sone.getProfile());
 592                                 storedSone.setPosts(sone.getPosts());
 593                                 storedSone.setReplies(sone.getReplies());
 594                                 storedSone.setLikePostIds(sone.getLikedPostIds());
 595                                 storedSone.setLikeReplyIds(sone.getLikedReplyIds());
 596                                 storedSone.setLatestEdition(sone.getRequestUri().getEdition());
 597                                 storedSone.setModificationCounter(0);
 598                         }
 599                 }
 600         }
 601
 602         /**
 603          * Deletes the given Sone. This will remove the Sone from the
 604          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
 605          * and remove the context from its identity.
 606          *
 607          * @param sone
 608          *            The Sone to delete
 609          */
 610         public void deleteSone(Sone sone) {
 611                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 612                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
 613                         return;
 614                 }
 615                 synchronized (localSones) {
 616                         if (!localSones.containsKey(sone.getId())) {
 617                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
 618                                 return;
 619                         }
 620                         localSones.remove(sone.getId());
 621                         soneInserters.remove(sone).stop();
 622                 }
 623                 identityManager.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 624                 identityManager.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 625                 try {
 626                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 627                 } catch (ConfigurationException ce1) {
 628                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 629                 }
 630         }
 631
 632         /**
 633          * Loads and updates the given Sone from the configuration. If any error is
 634          * encountered, loading is aborted and the given Sone is not changed.
 635          *
 636          * @param sone
 637          *            The Sone to load and update
 638          */
 639         public void loadSone(Sone sone) {
 640                 if (!isLocalSone(sone)) {
 641                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
 642                         return;
 643                 }
 644
 645                 /* load Sone. */
 646                 String sonePrefix = "Sone/" + sone.getId();
 647                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 648                 if (soneTime == null) {
 649                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 650                         return;
 651                 }
 652                 long soneModificationCounter = configuration.getLongValue(sonePrefix + "/ModificationCounter").getValue((long) 0);
 653
 654                 /* load profile. */
 655                 Profile profile = new Profile();
 656                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
 657                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
 658                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
 659                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
 660                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
 661                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
 662
 663                 /* load posts. */
 664                 Set<Post> posts = new HashSet<Post>();
 665                 while (true) {
 666                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
 667                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
 668                         if (postId == null) {
 669                                 break;
 670                         }
 671                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
 672                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
 673                         if ((postTime == 0) || (postText == null)) {
 674                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
 675                                 return;
 676                         }
 677                         posts.add(getPost(postId).setSone(sone).setTime(postTime).setText(postText));
 678                 }
 679
 680                 /* load replies. */
 681                 Set<Reply> replies = new HashSet<Reply>();
 682                 while (true) {
 683                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
 684                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
 685                         if (replyId == null) {
 686                                 break;
 687                         }
 688                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
 689                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
 690                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
 691                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
 692                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 693                                 return;
 694                         }
 695                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
 696                 }
 697
 698                 /* load post likes. */
 699                 Set<String> likedPostIds = new HashSet<String>();
 700                 while (true) {
 701                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
 702                         if (likedPostId == null) {
 703                                 break;
 704                         }
 705                         likedPostIds.add(likedPostId);
 706                 }
 707
 708                 /* load reply likes. */
 709                 Set<String> likedReplyIds = new HashSet<String>();
 710                 while (true) {
 711                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
 712                         if (likedReplyId == null) {
 713                                 break;
 714                         }
 715                         likedReplyIds.add(likedReplyId);
 716                 }
 717
 718                 /* load friends. */
 719                 Set<Sone> friends = new HashSet<Sone>();
 720                 while (true) {
 721                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
 722                         if (friendId == null) {
 723                                 break;
 724                         }
 725                         Boolean friendLocal = configuration.getBooleanValue(sonePrefix + "/Friends/" + friends.size() + "/Local").getValue(null);
 726                         if (friendLocal == null) {
 727                                 logger.log(Level.WARNING, "Invalid friend found, aborting load!");
 728                                 return;
 729                         }
 730                         friends.add(friendLocal ? getLocalSone(friendId) : getRemoteSone(friendId));
 731                 }
 732
 733                 /* if we’re still here, Sone was loaded successfully. */
 734                 synchronized (sone) {
 735                         sone.setTime(soneTime);
 736                         sone.setProfile(profile);
 737                         sone.setPosts(posts);
 738                         sone.setReplies(replies);
 739                         sone.setLikePostIds(likedPostIds);
 740                         sone.setLikeReplyIds(likedReplyIds);
 741                         sone.setFriends(friends);
 742                         sone.setModificationCounter(soneModificationCounter);
 743                 }
 744                 synchronized (newSones) {
 745                         for (Sone friend : friends) {
 746                                 knownSones.add(friend);
 747                         }
 748                 }
 749         }
 750
 751         /**
 752          * Saves the given Sone. This will persist all local settings for the given
 753          * Sone, such as the friends list and similar, private options.
 754          *
 755          * @param sone
 756          *            The Sone to save
 757          */
 758         public void saveSone(Sone sone) {
 759                 if (!isLocalSone(sone)) {
 760                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
 761                         return;
 762                 }
 763                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 764                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
 765                         return;
 766                 }
 767
 768                 logger.log(Level.INFO, "Saving Sone: %s", sone);
 769                 identityManager.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
 770                 try {
 771                         /* save Sone into configuration. */
 772                         String sonePrefix = "Sone/" + sone.getId();
 773                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 774                         configuration.getLongValue(sonePrefix + "/ModificationCounter").setValue(sone.getModificationCounter());
 775
 776                         /* save profile. */
 777                         Profile profile = sone.getProfile();
 778                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 779                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 780                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 781                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 782                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 783                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 784
 785                         /* save posts. */
 786                         int postCounter = 0;
 787                         for (Post post : sone.getPosts()) {
 788                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 789                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 790                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 791                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 792                         }
 793                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 794
 795                         /* save replies. */
 796                         int replyCounter = 0;
 797                         for (Reply reply : sone.getReplies()) {
 798                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 799                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 800                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
 801                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 802                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 803                         }
 804                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 805
 806                         /* save post likes. */
 807                         int postLikeCounter = 0;
 808                         for (String postId : sone.getLikedPostIds()) {
 809                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 810                         }
 811                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 812
 813                         /* save reply likes. */
 814                         int replyLikeCounter = 0;
 815                         for (String replyId : sone.getLikedReplyIds()) {
 816                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 817                         }
 818                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 819
 820                         /* save friends. */
 821                         int friendCounter = 0;
 822                         for (Sone friend : sone.getFriends()) {
 823                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(friend.getId());
 824                                 configuration.getBooleanValue(sonePrefix + "/Friends/" + friendCounter++ + "/Local").setValue(friend.getInsertUri() != null);
 825                         }
 826                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
 827
 828                         logger.log(Level.INFO, "Sone %s saved.", sone);
 829                 } catch (ConfigurationException ce1) {
 830                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
 831                 }
 832         }
 833
 834         /**
 835          * Creates a new post.
 836          *
 837          * @param sone
 838          *            The Sone that creates the post
 839          * @param text
 840          *            The text of the post
 841          */
 842         public void createPost(Sone sone, String text) {
 843                 createPost(sone, System.currentTimeMillis(), text);
 844         }
 845
 846         /**
 847          * Creates a new post.
 848          *
 849          * @param sone
 850          *            The Sone that creates the post
 851          * @param time
 852          *            The time of the post
 853          * @param text
 854          *            The text of the post
 855          */
 856         public void createPost(Sone sone, long time, String text) {
 857                 if (!isLocalSone(sone)) {
 858                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
 859                         return;
 860                 }
 861                 Post post = new Post(sone, time, text);
 862                 synchronized (posts) {
 863                         posts.put(post.getId(), post);
 864                 }
 865                 sone.addPost(post);
 866                 saveSone(sone);
 867         }
 868
 869         /**
 870          * Deletes the given post.
 871          *
 872          * @param post
 873          *            The post to delete
 874          */
 875         public void deletePost(Post post) {
 876                 if (!isLocalSone(post.getSone())) {
 877                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
 878                         return;
 879                 }
 880                 post.getSone().removePost(post);
 881                 synchronized (posts) {
 882                         posts.remove(post.getId());
 883                 }
 884                 saveSone(post.getSone());
 885         }
 886
 887         /**
 888          * Creates a new reply.
 889          *
 890          * @param sone
 891          *            The Sone that creates the reply
 892          * @param post
 893          *            The post that this reply refers to
 894          * @param text
 895          *            The text of the reply
 896          */
 897         public void createReply(Sone sone, Post post, String text) {
 898                 createReply(sone, post, System.currentTimeMillis(), text);
 899         }
 900
 901         /**
 902          * Creates a new reply.
 903          *
 904          * @param sone
 905          *            The Sone that creates the reply
 906          * @param post
 907          *            The post that this reply refers to
 908          * @param time
 909          *            The time of the reply
 910          * @param text
 911          *            The text of the reply
 912          */
 913         public void createReply(Sone sone, Post post, long time, String text) {
 914                 if (!isLocalSone(sone)) {
 915                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
 916                         return;
 917                 }
 918                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
 919                 synchronized (replies) {
 920                         replies.put(reply.getId(), reply);
 921                 }
 922                 sone.addReply(reply);
 923                 saveSone(sone);
 924         }
 925
 926         /**
 927          * Deletes the given reply.
 928          *
 929          * @param reply
 930          *            The reply to delete
 931          */
 932         public void deleteReply(Reply reply) {
 933                 Sone sone = reply.getSone();
 934                 if (!isLocalSone(sone)) {
 935                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
 936                         return;
 937                 }
 938                 synchronized (replies) {
 939                         replies.remove(reply.getId());
 940                 }
 941                 sone.removeReply(reply);
 942                 saveSone(sone);
 943         }
 944
 945         /**
 946          * Starts the core.
 947          */
 948         public void start() {
 949                 loadConfiguration();
 950         }
 951
 952         /**
 953          * Stops the core.
 954          */
 955         public void stop() {
 956                 synchronized (localSones) {
 957                         for (SoneInserter soneInserter : soneInserters.values()) {
 958                                 soneInserter.stop();
 959                         }
 960                 }
 961                 saveConfiguration();
 962         }
 963
 964         //
 965         // PRIVATE METHODS
 966         //
 967
 968         /**
 969          * Loads the configuration.
 970          */
 971         @SuppressWarnings("unchecked")
 972         private void loadConfiguration() {
 973                 /* create options. */
 974                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
 975
 976                         @Override
 977                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
 978                                 SoneInserter.setInsertionDelay(newValue);
 979                         }
 980
 981                 }));
 982                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
 983                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
 984
 985                 /* read options from configuration. */
 986                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
 987                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
 988                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
 989                 options.getBooleanOption("ClearOnNextRestart").set(null);
 990                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
 991                 if (clearConfiguration) {
 992                         /* stop loading the configuration. */
 993                         return;
 994                 }
 995
 996                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
 997
 998                 /* load known Sones. */
 999                 int soneCounter = 0;
1000                 while (true) {
1001                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1002                         if (knownSoneId == null) {
1003                                 break;
1004                         }
1005                         synchronized (newSones) {
1006                                 knownSones.add(getRemoteSone(knownSoneId));
1007                         }
1008                 }
1009         }
1010
1011         /**
1012          * Saves the current options.
1013          */
1014         private void saveConfiguration() {
1015                 /* store the options first. */
1016                 try {
1017                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1018                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1019                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1020
1021                         /* save known Sones. */
1022                         int soneCounter = 0;
1023                         synchronized (newSones) {
1024                                 for (Sone knownSone : knownSones) {
1025                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSone.getId());
1026                                 }
1027                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1028                         }
1029
1030                 } catch (ConfigurationException ce1) {
1031                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1032                 }
1033         }
1034
1035         /**
1036          * Generate a Sone URI from the given URI and latest edition.
1037          *
1038          * @param uriString
1039          *            The URI to derive the Sone URI from
1040          * @return The derived URI
1041          */
1042         private FreenetURI getSoneUri(String uriString) {
1043                 try {
1044                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
1045                         return uri;
1046                 } catch (MalformedURLException mue1) {
1047                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
1048                         return null;
1049                 }
1050         }
1051
1052         //
1053         // INTERFACE IdentityListener
1054         //
1055
1056         /**
1057          * {@inheritDoc}
1058          */
1059         @Override
1060         public void ownIdentityAdded(OwnIdentity ownIdentity) {
1061                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
1062                 if (ownIdentity.hasContext("Sone")) {
1063                         addLocalSone(ownIdentity);
1064                 }
1065         }
1066
1067         /**
1068          * {@inheritDoc}
1069          */
1070         @Override
1071         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
1072                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
1073         }
1074
1075         /**
1076          * {@inheritDoc}
1077          */
1078         @Override
1079         public void identityAdded(Identity identity) {
1080                 logger.log(Level.FINEST, "Adding Identity: " + identity);
1081                 addRemoteSone(identity);
1082         }
1083
1084         /**
1085          * {@inheritDoc}
1086          */
1087         @Override
1088         public void identityUpdated(final Identity identity) {
1089                 new Thread(new Runnable() {
1090
1091                         @Override
1092                         @SuppressWarnings("synthetic-access")
1093                         public void run() {
1094                                 Sone sone = getRemoteSone(identity.getId());
1095                                 soneDownloader.fetchSone(sone);
1096                         }
1097                 }).start();
1098         }
1099
1100         /**
1101          * {@inheritDoc}
1102          */
1103         @Override
1104         public void identityRemoved(Identity identity) {
1105                 /* TODO */
1106         }
1107
1108 }