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