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.Client;
  35 import net.pterodactylus.sone.data.Post;
  36 import net.pterodactylus.sone.data.Profile;
  37 import net.pterodactylus.sone.data.Reply;
  38 import net.pterodactylus.sone.data.Sone;
  39 import net.pterodactylus.sone.freenet.wot.Identity;
  40 import net.pterodactylus.sone.freenet.wot.IdentityListener;
  41 import net.pterodactylus.sone.freenet.wot.IdentityManager;
  42 import net.pterodactylus.sone.freenet.wot.OwnIdentity;
  43 import net.pterodactylus.sone.main.SonePlugin;
  44 import net.pterodactylus.util.config.Configuration;
  45 import net.pterodactylus.util.config.ConfigurationException;
  46 import net.pterodactylus.util.logging.Logging;
  47 import net.pterodactylus.util.number.Numbers;
  48 import freenet.keys.FreenetURI;
  49
  50 /**
  51  * The Sone core.
  52  *
  53  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  54  */
  55 public class Core implements IdentityListener {
  56
  57         /**
  58          * Enumeration for the possible states of a {@link Sone}.
  59          *
  60          * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  61          */
  62         public enum SoneStatus {
  63
  64                 /** The Sone is unknown, i.e. not yet downloaded. */
  65                 unknown,
  66
  67                 /** The Sone is idle, i.e. not being downloaded or inserted. */
  68                 idle,
  69
  70                 /** The Sone is currently being inserted. */
  71                 inserting,
  72
  73                 /** The Sone is currently being downloaded. */
  74                 downloading,
  75         }
  76
  77         /** The logger. */
  78         private static final Logger logger = Logging.getLogger(Core.class);
  79
  80         /** The options. */
  81         private final Options options = new Options();
  82
  83         /** The configuration. */
  84         private final Configuration configuration;
  85
  86         /** The identity manager. */
  87         private final IdentityManager identityManager;
  88
  89         /** Interface to freenet. */
  90         private final FreenetInterface freenetInterface;
  91
  92         /** The Sone downloader. */
  93         private final SoneDownloader soneDownloader;
  94
  95         /** The Sones’ statuses. */
  96         /* synchronize access on itself. */
  97         private final Map<Sone, SoneStatus> soneStatuses = new HashMap<Sone, SoneStatus>();
  98
  99         /** Sone inserters. */
 100         /* synchronize access on this on localSones. */
 101         private final Map<Sone, SoneInserter> soneInserters = new HashMap<Sone, SoneInserter>();
 102
 103         /** All local Sones. */
 104         /* synchronize access on this on itself. */
 105         private Map<String, Sone> localSones = new HashMap<String, Sone>();
 106
 107         /** All remote Sones. */
 108         /* synchronize access on this on itself. */
 109         private Map<String, Sone> remoteSones = new HashMap<String, Sone>();
 110
 111         /** All new Sones. */
 112         private Set<String> newSones = new HashSet<String>();
 113
 114         /** All known Sones. */
 115         /* synchronize access on {@link #newSones}. */
 116         private Set<String> knownSones = new HashSet<String>();
 117
 118         /** All posts. */
 119         private Map<String, Post> posts = new HashMap<String, Post>();
 120
 121         /** All new posts. */
 122         private Set<String> newPosts = new HashSet<String>();
 123
 124         /** All known posts. */
 125         /* synchronize access on {@link #newPosts}. */
 126         private Set<String> knownPosts = new HashSet<String>();
 127
 128         /** All replies. */
 129         private Map<String, Reply> replies = new HashMap<String, Reply>();
 130
 131         /** All new replies. */
 132         private Set<String> newReplies = new HashSet<String>();
 133
 134         /** All known replies. */
 135         private Set<String> knownReplies = new HashSet<String>();
 136
 137         /**
 138          * Creates a new core.
 139          *
 140          * @param configuration
 141          *            The configuration of the core
 142          * @param freenetInterface
 143          *            The freenet interface
 144          * @param identityManager
 145          *            The identity manager
 146          */
 147         public Core(Configuration configuration, FreenetInterface freenetInterface, IdentityManager identityManager) {
 148                 this.configuration = configuration;
 149                 this.freenetInterface = freenetInterface;
 150                 this.identityManager = identityManager;
 151                 this.soneDownloader = new SoneDownloader(this, freenetInterface);
 152         }
 153
 154         //
 155         // ACCESSORS
 156         //
 157
 158         /**
 159          * Returns the options used by the core.
 160          *
 161          * @return The options of the core
 162          */
 163         public Options getOptions() {
 164                 return options;
 165         }
 166
 167         /**
 168          * Returns the identity manager used by the core.
 169          *
 170          * @return The identity manager
 171          */
 172         public IdentityManager getIdentityManager() {
 173                 return identityManager;
 174         }
 175
 176         /**
 177          * Returns the status of the given Sone.
 178          *
 179          * @param sone
 180          *            The Sone to get the status for
 181          * @return The status of the Sone
 182          */
 183         public SoneStatus getSoneStatus(Sone sone) {
 184                 synchronized (soneStatuses) {
 185                         return soneStatuses.get(sone);
 186                 }
 187         }
 188
 189         /**
 190          * Sets the status of the given Sone.
 191          *
 192          * @param sone
 193          *            The Sone to set the status of
 194          * @param soneStatus
 195          *            The status to set
 196          */
 197         public void setSoneStatus(Sone sone, SoneStatus soneStatus) {
 198                 synchronized (soneStatuses) {
 199                         soneStatuses.put(sone, soneStatus);
 200                 }
 201         }
 202
 203         /**
 204          * Returns all Sones, remote and local.
 205          *
 206          * @return All Sones
 207          */
 208         public Set<Sone> getSones() {
 209                 Set<Sone> allSones = new HashSet<Sone>();
 210                 allSones.addAll(getLocalSones());
 211                 allSones.addAll(getRemoteSones());
 212                 return allSones;
 213         }
 214
 215         /**
 216          * Returns the Sone with the given ID, regardless whether it’s local or
 217          * remote.
 218          *
 219          * @param id
 220          *            The ID of the Sone to get
 221          * @return The Sone with the given ID, or {@code null} if there is no such
 222          *         Sone
 223          */
 224         public Sone getSone(String id) {
 225                 return getSone(id, true);
 226         }
 227
 228         /**
 229          * Returns the Sone with the given ID, regardless whether it’s local or
 230          * remote.
 231          *
 232          * @param id
 233          *            The ID of the Sone to get
 234          * @param create
 235          *            {@code true} to create a new Sone if none exists,
 236          *            {@code false} to return {@code null} if a Sone with the given
 237          *            ID does not exist
 238          * @return The Sone with the given ID, or {@code null} if there is no such
 239          *         Sone
 240          */
 241         public Sone getSone(String id, boolean create) {
 242                 if (isLocalSone(id)) {
 243                         return getLocalSone(id);
 244                 }
 245                 return getRemoteSone(id, create);
 246         }
 247
 248         /**
 249          * Checks whether the core knows a Sone with the given ID.
 250          *
 251          * @param id
 252          *            The ID of the Sone
 253          * @return {@code true} if there is a Sone with the given ID, {@code false}
 254          *         otherwise
 255          */
 256         public boolean hasSone(String id) {
 257                 return isLocalSone(id) || isRemoteSone(id);
 258         }
 259
 260         /**
 261          * Returns whether the given Sone is a local Sone.
 262          *
 263          * @param sone
 264          *            The Sone to check for its locality
 265          * @return {@code true} if the given Sone is local, {@code false} otherwise
 266          */
 267         public boolean isLocalSone(Sone sone) {
 268                 synchronized (localSones) {
 269                         return localSones.containsKey(sone.getId());
 270                 }
 271         }
 272
 273         /**
 274          * Returns whether the given ID is the ID of a local Sone.
 275          *
 276          * @param id
 277          *            The Sone ID to check for its locality
 278          * @return {@code true} if the given ID is a local Sone, {@code false}
 279          *         otherwise
 280          */
 281         public boolean isLocalSone(String id) {
 282                 synchronized (localSones) {
 283                         return localSones.containsKey(id);
 284                 }
 285         }
 286
 287         /**
 288          * Returns all local Sones.
 289          *
 290          * @return All local Sones
 291          */
 292         public Set<Sone> getLocalSones() {
 293                 synchronized (localSones) {
 294                         return new HashSet<Sone>(localSones.values());
 295                 }
 296         }
 297
 298         /**
 299          * Returns the local Sone with the given ID.
 300          *
 301          * @param id
 302          *            The ID of the Sone to get
 303          * @return The Sone with the given ID
 304          */
 305         public Sone getLocalSone(String id) {
 306                 return getLocalSone(id, true);
 307         }
 308
 309         /**
 310          * Returns the local Sone with the given ID, optionally creating a new Sone.
 311          *
 312          * @param id
 313          *            The ID of the Sone
 314          * @param create
 315          *            {@code true} to create a new Sone if none exists,
 316          *            {@code false} to return null if none exists
 317          * @return The Sone with the given ID, or {@code null}
 318          */
 319         public Sone getLocalSone(String id, boolean create) {
 320                 synchronized (localSones) {
 321                         Sone sone = localSones.get(id);
 322                         if ((sone == null) && create) {
 323                                 sone = new Sone(id);
 324                                 localSones.put(id, sone);
 325                         }
 326                         return sone;
 327                 }
 328         }
 329
 330         /**
 331          * Returns all remote Sones.
 332          *
 333          * @return All remote Sones
 334          */
 335         public Set<Sone> getRemoteSones() {
 336                 synchronized (remoteSones) {
 337                         return new HashSet<Sone>(remoteSones.values());
 338                 }
 339         }
 340
 341         /**
 342          * Returns the remote Sone with the given ID.
 343          *
 344          * @param id
 345          *            The ID of the remote Sone to get
 346          * @return The Sone with the given ID
 347          */
 348         public Sone getRemoteSone(String id) {
 349                 return getRemoteSone(id, true);
 350         }
 351
 352         /**
 353          * Returns the remote Sone with the given ID.
 354          *
 355          * @param id
 356          *            The ID of the remote Sone to get
 357          * @param create
 358          *            {@code true} to always create a Sone, {@code false} to return
 359          *            {@code null} if no Sone with the given ID exists
 360          * @return The Sone with the given ID
 361          */
 362         public Sone getRemoteSone(String id, boolean create) {
 363                 synchronized (remoteSones) {
 364                         Sone sone = remoteSones.get(id);
 365                         if ((sone == null) && create) {
 366                                 sone = new Sone(id);
 367                                 remoteSones.put(id, sone);
 368                         }
 369                         return sone;
 370                 }
 371         }
 372
 373         /**
 374          * Returns whether the given Sone is a remote Sone.
 375          *
 376          * @param sone
 377          *            The Sone to check
 378          * @return {@code true} if the given Sone is a remote Sone, {@code false}
 379          *         otherwise
 380          */
 381         public boolean isRemoteSone(Sone sone) {
 382                 synchronized (remoteSones) {
 383                         return remoteSones.containsKey(sone.getId());
 384                 }
 385         }
 386
 387         /**
 388          * Returns whether the Sone with the given ID is a remote Sone.
 389          *
 390          * @param id
 391          *            The ID of the Sone to check
 392          * @return {@code true} if the Sone with the given ID is a remote Sone,
 393          *         {@code false} otherwise
 394          */
 395         public boolean isRemoteSone(String id) {
 396                 synchronized (remoteSones) {
 397                         return remoteSones.containsKey(id);
 398                 }
 399         }
 400
 401         /**
 402          * Returns whether the given Sone is a new Sone. After this check, the Sone
 403          * is marked as known, i.e. a second call with the same parameters will
 404          * always yield {@code false}.
 405          *
 406          * @param sone
 407          *            The sone to check for
 408          * @return {@code true} if the given Sone is new, false otherwise
 409          */
 410         public boolean isNewSone(Sone sone) {
 411                 synchronized (newSones) {
 412                         boolean isNew = !knownSones.contains(sone.getId()) && newSones.remove(sone.getId());
 413                         knownSones.add(sone.getId());
 414                         return isNew;
 415                 }
 416         }
 417
 418         /**
 419          * Returns whether the given Sone has been modified.
 420          *
 421          * @param sone
 422          *            The Sone to check for modifications
 423          * @return {@code true} if a modification has been detected in the Sone,
 424          *         {@code false} otherwise
 425          */
 426         public boolean isModifiedSone(Sone sone) {
 427                 return (soneInserters.containsKey(sone)) ? soneInserters.get(sone).isModified() : false;
 428         }
 429
 430         /**
 431          * Returns the post with the given ID.
 432          *
 433          * @param postId
 434          *            The ID of the post to get
 435          * @return The post, or {@code null} if there is no such post
 436          */
 437         public Post getPost(String postId) {
 438                 synchronized (posts) {
 439                         Post post = posts.get(postId);
 440                         if (post == null) {
 441                                 post = new Post(postId);
 442                                 posts.put(postId, post);
 443                         }
 444                         return post;
 445                 }
 446         }
 447
 448         /**
 449          * Returns whether the given post ID is new. After this method returns it is
 450          * marked a known post ID.
 451          *
 452          * @param postId
 453          *            The post ID
 454          * @return {@code true} if the post is considered to be new, {@code false}
 455          *         otherwise
 456          */
 457         public boolean isNewPost(String postId) {
 458                 synchronized (newPosts) {
 459                         boolean isNew = !knownPosts.contains(postId) && newPosts.remove(postId);
 460                         knownPosts.add(postId);
 461                         return isNew;
 462                 }
 463         }
 464
 465         /**
 466          * Returns the reply with the given ID.
 467          *
 468          * @param replyId
 469          *            The ID of the reply to get
 470          * @return The reply, or {@code null} if there is no such reply
 471          */
 472         public Reply getReply(String replyId) {
 473                 synchronized (replies) {
 474                         Reply reply = replies.get(replyId);
 475                         if (reply == null) {
 476                                 reply = new Reply(replyId);
 477                                 replies.put(replyId, reply);
 478                         }
 479                         return reply;
 480                 }
 481         }
 482
 483         /**
 484          * Returns all replies for the given post, order ascending by time.
 485          *
 486          * @param post
 487          *            The post to get all replies for
 488          * @return All replies for the given post
 489          */
 490         public List<Reply> getReplies(Post post) {
 491                 Set<Sone> sones = getSones();
 492                 List<Reply> replies = new ArrayList<Reply>();
 493                 for (Sone sone : sones) {
 494                         for (Reply reply : sone.getReplies()) {
 495                                 if (reply.getPost().equals(post)) {
 496                                         replies.add(reply);
 497                                 }
 498                         }
 499                 }
 500                 Collections.sort(replies, Reply.TIME_COMPARATOR);
 501                 return replies;
 502         }
 503
 504         /**
 505          * Returns whether the reply with the given ID is new.
 506          *
 507          * @param replyId
 508          *            The ID of the reply to check
 509          * @return {@code true} if the reply is considered to be new, {@code false}
 510          *         otherwise
 511          */
 512         public boolean isNewReply(String replyId) {
 513                 synchronized (newReplies) {
 514                         boolean isNew = !knownReplies.contains(replyId) && newReplies.remove(replyId);
 515                         knownReplies.add(replyId);
 516                         return isNew;
 517                 }
 518         }
 519
 520         /**
 521          * Returns all Sones that have liked the given post.
 522          *
 523          * @param post
 524          *            The post to get the liking Sones for
 525          * @return The Sones that like the given post
 526          */
 527         public Set<Sone> getLikes(Post post) {
 528                 Set<Sone> sones = new HashSet<Sone>();
 529                 for (Sone sone : getSones()) {
 530                         if (sone.getLikedPostIds().contains(post.getId())) {
 531                                 sones.add(sone);
 532                         }
 533                 }
 534                 return sones;
 535         }
 536
 537         /**
 538          * Returns all Sones that have liked the given reply.
 539          *
 540          * @param reply
 541          *            The reply to get the liking Sones for
 542          * @return The Sones that like the given reply
 543          */
 544         public Set<Sone> getLikes(Reply reply) {
 545                 Set<Sone> sones = new HashSet<Sone>();
 546                 for (Sone sone : getSones()) {
 547                         if (sone.getLikedReplyIds().contains(reply.getId())) {
 548                                 sones.add(sone);
 549                         }
 550                 }
 551                 return sones;
 552         }
 553
 554         //
 555         // ACTIONS
 556         //
 557
 558         /**
 559          * Adds a local Sone from the given ID which has to be the ID of an own
 560          * identity.
 561          *
 562          * @param id
 563          *            The ID of an own identity to add a Sone for
 564          * @return The added (or already existing) Sone
 565          */
 566         public Sone addLocalSone(String id) {
 567                 synchronized (localSones) {
 568                         if (localSones.containsKey(id)) {
 569                                 logger.log(Level.FINE, "Tried to add known local Sone: %s", id);
 570                                 return localSones.get(id);
 571                         }
 572                         OwnIdentity ownIdentity = identityManager.getOwnIdentity(id);
 573                         if (ownIdentity == null) {
 574                                 logger.log(Level.INFO, "Invalid Sone ID: %s", id);
 575                                 return null;
 576                         }
 577                         return addLocalSone(ownIdentity);
 578                 }
 579         }
 580
 581         /**
 582          * Adds a local Sone from the given own identity.
 583          *
 584          * @param ownIdentity
 585          *            The own identity to create a Sone from
 586          * @return The added (or already existing) Sone
 587          */
 588         public Sone addLocalSone(OwnIdentity ownIdentity) {
 589                 if (ownIdentity == null) {
 590                         logger.log(Level.WARNING, "Given OwnIdentity is null!");
 591                         return null;
 592                 }
 593                 synchronized (localSones) {
 594                         final Sone sone;
 595                         try {
 596                                 sone = getLocalSone(ownIdentity.getId()).setIdentity(ownIdentity).setInsertUri(new FreenetURI(ownIdentity.getInsertUri())).setRequestUri(new FreenetURI(ownIdentity.getRequestUri()));
 597                         } catch (MalformedURLException mue1) {
 598                                 logger.log(Level.SEVERE, "Could not convert the Identity’s URIs to Freenet URIs: " + ownIdentity.getInsertUri() + ", " + ownIdentity.getRequestUri(), mue1);
 599                                 return null;
 600                         }
 601                         sone.setLatestEdition(Numbers.safeParseLong(ownIdentity.getProperty("Sone.LatestEdition"), (long) 0));
 602                         sone.setClient(new Client("Sone", SonePlugin.VERSION.toString()));
 603                         /* TODO - load posts ’n stuff */
 604                         localSones.put(ownIdentity.getId(), sone);
 605                         SoneInserter soneInserter = new SoneInserter(this, freenetInterface, sone);
 606                         soneInserters.put(sone, soneInserter);
 607                         setSoneStatus(sone, SoneStatus.idle);
 608                         loadSone(sone);
 609                         soneInserter.start();
 610                         new Thread(new Runnable() {
 611
 612                                 @Override
 613                                 @SuppressWarnings("synthetic-access")
 614                                 public void run() {
 615                                         soneDownloader.fetchSone(sone);
 616                                 }
 617
 618                         }, "Sone Downloader").start();
 619                         return sone;
 620                 }
 621         }
 622
 623         /**
 624          * Creates a new Sone for the given own identity.
 625          *
 626          * @param ownIdentity
 627          *            The own identity to create a Sone for
 628          * @return The created Sone
 629          */
 630         public Sone createSone(OwnIdentity ownIdentity) {
 631                 identityManager.addContext(ownIdentity, "Sone");
 632                 Sone sone = addLocalSone(ownIdentity);
 633                 return sone;
 634         }
 635
 636         /**
 637          * Adds the Sone of the given identity.
 638          *
 639          * @param identity
 640          *            The identity whose Sone to add
 641          * @return The added or already existing Sone
 642          */
 643         public Sone addRemoteSone(Identity identity) {
 644                 if (identity == null) {
 645                         logger.log(Level.WARNING, "Given Identity is null!");
 646                         return null;
 647                 }
 648                 synchronized (remoteSones) {
 649                         final Sone sone = getRemoteSone(identity.getId()).setIdentity(identity);
 650                         boolean newSone = sone.getRequestUri() == null;
 651                         sone.setRequestUri(getSoneUri(identity.getRequestUri()));
 652                         sone.setLatestEdition(Numbers.safeParseLong(identity.getProperty("Sone.LatestEdition"), (long) 0));
 653                         if (newSone) {
 654                                 synchronized (newSones) {
 655                                         newSones.add(sone.getId());
 656                                 }
 657                         }
 658                         remoteSones.put(identity.getId(), sone);
 659                         soneDownloader.addSone(sone);
 660                         setSoneStatus(sone, SoneStatus.unknown);
 661                         new Thread(new Runnable() {
 662
 663                                 @Override
 664                                 @SuppressWarnings("synthetic-access")
 665                                 public void run() {
 666                                         soneDownloader.fetchSone(sone);
 667                                 }
 668
 669                         }, "Sone Downloader").start();
 670                         return sone;
 671                 }
 672         }
 673
 674         /**
 675          * Updates the stores Sone with the given Sone.
 676          *
 677          * @param sone
 678          *            The updated Sone
 679          */
 680         public void updateSone(Sone sone) {
 681                 if (hasSone(sone.getId())) {
 682                         Sone storedSone = getSone(sone.getId());
 683                         if (!(sone.getTime() > storedSone.getTime())) {
 684                                 logger.log(Level.FINE, "Downloaded Sone %s is not newer than stored Sone %s.", new Object[] { sone, storedSone });
 685                                 return;
 686                         }
 687                         synchronized (posts) {
 688                                 for (Post post : storedSone.getPosts()) {
 689                                         posts.remove(post.getId());
 690                                 }
 691                                 synchronized (newPosts) {
 692                                         for (Post post : sone.getPosts()) {
 693                                                 if (!storedSone.getPosts().contains(post) && !knownSones.contains(post.getId())) {
 694                                                         newPosts.add(post.getId());
 695                                                 }
 696                                                 posts.put(post.getId(), post);
 697                                         }
 698                                 }
 699                         }
 700                         synchronized (replies) {
 701                                 for (Reply reply : storedSone.getReplies()) {
 702                                         replies.remove(reply.getId());
 703                                 }
 704                                 synchronized (newReplies) {
 705                                         for (Reply reply : sone.getReplies()) {
 706                                                 if (!storedSone.getReplies().contains(reply) && !knownSones.contains(reply.getId())) {
 707                                                         newReplies.add(reply.getId());
 708                                                 }
 709                                                 replies.put(reply.getId(), reply);
 710                                         }
 711                                 }
 712                         }
 713                         synchronized (storedSone) {
 714                                 storedSone.setTime(sone.getTime());
 715                                 storedSone.setClient(sone.getClient());
 716                                 storedSone.setProfile(sone.getProfile());
 717                                 storedSone.setPosts(sone.getPosts());
 718                                 storedSone.setReplies(sone.getReplies());
 719                                 storedSone.setLikePostIds(sone.getLikedPostIds());
 720                                 storedSone.setLikeReplyIds(sone.getLikedReplyIds());
 721                                 storedSone.setLatestEdition(sone.getRequestUri().getEdition());
 722                         }
 723                 }
 724         }
 725
 726         /**
 727          * Deletes the given Sone. This will remove the Sone from the
 728          * {@link #getLocalSone(String) local Sones}, stops its {@link SoneInserter}
 729          * and remove the context from its identity.
 730          *
 731          * @param sone
 732          *            The Sone to delete
 733          */
 734         public void deleteSone(Sone sone) {
 735                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 736                         logger.log(Level.WARNING, "Tried to delete Sone of non-own identity: %s", sone);
 737                         return;
 738                 }
 739                 synchronized (localSones) {
 740                         if (!localSones.containsKey(sone.getId())) {
 741                                 logger.log(Level.WARNING, "Tried to delete non-local Sone: %s", sone);
 742                                 return;
 743                         }
 744                         localSones.remove(sone.getId());
 745                         soneInserters.remove(sone).stop();
 746                 }
 747                 identityManager.removeContext((OwnIdentity) sone.getIdentity(), "Sone");
 748                 identityManager.removeProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition");
 749                 try {
 750                         configuration.getLongValue("Sone/" + sone.getId() + "/Time").setValue(null);
 751                 } catch (ConfigurationException ce1) {
 752                         logger.log(Level.WARNING, "Could not remove Sone from configuration!", ce1);
 753                 }
 754         }
 755
 756         /**
 757          * Loads and updates the given Sone from the configuration. If any error is
 758          * encountered, loading is aborted and the given Sone is not changed.
 759          *
 760          * @param sone
 761          *            The Sone to load and update
 762          */
 763         public void loadSone(Sone sone) {
 764                 if (!isLocalSone(sone)) {
 765                         logger.log(Level.FINE, "Tried to load non-local Sone: %s", sone);
 766                         return;
 767                 }
 768
 769                 /* load Sone. */
 770                 String sonePrefix = "Sone/" + sone.getId();
 771                 Long soneTime = configuration.getLongValue(sonePrefix + "/Time").getValue(null);
 772                 if (soneTime == null) {
 773                         logger.log(Level.INFO, "Could not load Sone because no Sone has been saved.");
 774                         return;
 775                 }
 776                 String lastInsertFingerprint = configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").getValue("");
 777
 778                 /* load profile. */
 779                 Profile profile = new Profile();
 780                 profile.setFirstName(configuration.getStringValue(sonePrefix + "/Profile/FirstName").getValue(null));
 781                 profile.setMiddleName(configuration.getStringValue(sonePrefix + "/Profile/MiddleName").getValue(null));
 782                 profile.setLastName(configuration.getStringValue(sonePrefix + "/Profile/LastName").getValue(null));
 783                 profile.setBirthDay(configuration.getIntValue(sonePrefix + "/Profile/BirthDay").getValue(null));
 784                 profile.setBirthMonth(configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").getValue(null));
 785                 profile.setBirthYear(configuration.getIntValue(sonePrefix + "/Profile/BirthYear").getValue(null));
 786
 787                 /* load posts. */
 788                 Set<Post> posts = new HashSet<Post>();
 789                 while (true) {
 790                         String postPrefix = sonePrefix + "/Posts/" + posts.size();
 791                         String postId = configuration.getStringValue(postPrefix + "/ID").getValue(null);
 792                         if (postId == null) {
 793                                 break;
 794                         }
 795                         long postTime = configuration.getLongValue(postPrefix + "/Time").getValue((long) 0);
 796                         String postText = configuration.getStringValue(postPrefix + "/Text").getValue(null);
 797                         if ((postTime == 0) || (postText == null)) {
 798                                 logger.log(Level.WARNING, "Invalid post found, aborting load!");
 799                                 return;
 800                         }
 801                         posts.add(getPost(postId).setSone(sone).setTime(postTime).setText(postText));
 802                 }
 803
 804                 /* load replies. */
 805                 Set<Reply> replies = new HashSet<Reply>();
 806                 while (true) {
 807                         String replyPrefix = sonePrefix + "/Replies/" + replies.size();
 808                         String replyId = configuration.getStringValue(replyPrefix + "/ID").getValue(null);
 809                         if (replyId == null) {
 810                                 break;
 811                         }
 812                         String postId = configuration.getStringValue(replyPrefix + "/Post/ID").getValue(null);
 813                         long replyTime = configuration.getLongValue(replyPrefix + "/Time").getValue((long) 0);
 814                         String replyText = configuration.getStringValue(replyPrefix + "/Text").getValue(null);
 815                         if ((postId == null) || (replyTime == 0) || (replyText == null)) {
 816                                 logger.log(Level.WARNING, "Invalid reply found, aborting load!");
 817                                 return;
 818                         }
 819                         replies.add(getReply(replyId).setSone(sone).setPost(getPost(postId)).setTime(replyTime).setText(replyText));
 820                 }
 821
 822                 /* load post likes. */
 823                 Set<String> likedPostIds = new HashSet<String>();
 824                 while (true) {
 825                         String likedPostId = configuration.getStringValue(sonePrefix + "/Likes/Post/" + likedPostIds.size() + "/ID").getValue(null);
 826                         if (likedPostId == null) {
 827                                 break;
 828                         }
 829                         likedPostIds.add(likedPostId);
 830                 }
 831
 832                 /* load reply likes. */
 833                 Set<String> likedReplyIds = new HashSet<String>();
 834                 while (true) {
 835                         String likedReplyId = configuration.getStringValue(sonePrefix + "/Likes/Reply/" + likedReplyIds.size() + "/ID").getValue(null);
 836                         if (likedReplyId == null) {
 837                                 break;
 838                         }
 839                         likedReplyIds.add(likedReplyId);
 840                 }
 841
 842                 /* load friends. */
 843                 Set<String> friends = new HashSet<String>();
 844                 while (true) {
 845                         String friendId = configuration.getStringValue(sonePrefix + "/Friends/" + friends.size() + "/ID").getValue(null);
 846                         if (friendId == null) {
 847                                 break;
 848                         }
 849                         friends.add(friendId);
 850                 }
 851
 852                 /* if we’re still here, Sone was loaded successfully. */
 853                 synchronized (sone) {
 854                         sone.setTime(soneTime);
 855                         sone.setProfile(profile);
 856                         sone.setPosts(posts);
 857                         sone.setReplies(replies);
 858                         sone.setLikePostIds(likedPostIds);
 859                         sone.setLikeReplyIds(likedReplyIds);
 860                         sone.setFriends(friends);
 861                         soneInserters.get(sone).setLastInsertFingerprint(lastInsertFingerprint);
 862                 }
 863                 synchronized (newSones) {
 864                         for (String friend : friends) {
 865                                 knownSones.add(friend);
 866                         }
 867                 }
 868                 synchronized (newPosts) {
 869                         for (Post post : posts) {
 870                                 knownPosts.add(post.getId());
 871                         }
 872                 }
 873                 synchronized (newReplies) {
 874                         for (Reply reply : replies) {
 875                                 knownReplies.add(reply.getId());
 876                         }
 877                 }
 878         }
 879
 880         /**
 881          * Saves the given Sone. This will persist all local settings for the given
 882          * Sone, such as the friends list and similar, private options.
 883          *
 884          * @param sone
 885          *            The Sone to save
 886          */
 887         public void saveSone(Sone sone) {
 888                 if (!isLocalSone(sone)) {
 889                         logger.log(Level.FINE, "Tried to save non-local Sone: %s", sone);
 890                         return;
 891                 }
 892                 if (!(sone.getIdentity() instanceof OwnIdentity)) {
 893                         logger.log(Level.WARNING, "Local Sone without OwnIdentity found, refusing to save: %s", sone);
 894                         return;
 895                 }
 896
 897                 logger.log(Level.INFO, "Saving Sone: %s", sone);
 898                 identityManager.setProperty((OwnIdentity) sone.getIdentity(), "Sone.LatestEdition", String.valueOf(sone.getLatestEdition()));
 899                 try {
 900                         /* save Sone into configuration. */
 901                         String sonePrefix = "Sone/" + sone.getId();
 902                         configuration.getLongValue(sonePrefix + "/Time").setValue(sone.getTime());
 903                         configuration.getStringValue(sonePrefix + "/LastInsertFingerprint").setValue(soneInserters.get(sone).getLastInsertFingerprint());
 904
 905                         /* save profile. */
 906                         Profile profile = sone.getProfile();
 907                         configuration.getStringValue(sonePrefix + "/Profile/FirstName").setValue(profile.getFirstName());
 908                         configuration.getStringValue(sonePrefix + "/Profile/MiddleName").setValue(profile.getMiddleName());
 909                         configuration.getStringValue(sonePrefix + "/Profile/LastName").setValue(profile.getLastName());
 910                         configuration.getIntValue(sonePrefix + "/Profile/BirthDay").setValue(profile.getBirthDay());
 911                         configuration.getIntValue(sonePrefix + "/Profile/BirthMonth").setValue(profile.getBirthMonth());
 912                         configuration.getIntValue(sonePrefix + "/Profile/BirthYear").setValue(profile.getBirthYear());
 913
 914                         /* save posts. */
 915                         int postCounter = 0;
 916                         for (Post post : sone.getPosts()) {
 917                                 String postPrefix = sonePrefix + "/Posts/" + postCounter++;
 918                                 configuration.getStringValue(postPrefix + "/ID").setValue(post.getId());
 919                                 configuration.getLongValue(postPrefix + "/Time").setValue(post.getTime());
 920                                 configuration.getStringValue(postPrefix + "/Text").setValue(post.getText());
 921                         }
 922                         configuration.getStringValue(sonePrefix + "/Posts/" + postCounter + "/ID").setValue(null);
 923
 924                         /* save replies. */
 925                         int replyCounter = 0;
 926                         for (Reply reply : sone.getReplies()) {
 927                                 String replyPrefix = sonePrefix + "/Replies/" + replyCounter++;
 928                                 configuration.getStringValue(replyPrefix + "/ID").setValue(reply.getId());
 929                                 configuration.getStringValue(replyPrefix + "/Post/ID").setValue(reply.getPost().getId());
 930                                 configuration.getLongValue(replyPrefix + "/Time").setValue(reply.getTime());
 931                                 configuration.getStringValue(replyPrefix + "/Text").setValue(reply.getText());
 932                         }
 933                         configuration.getStringValue(sonePrefix + "/Replies/" + replyCounter + "/ID").setValue(null);
 934
 935                         /* save post likes. */
 936                         int postLikeCounter = 0;
 937                         for (String postId : sone.getLikedPostIds()) {
 938                                 configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter++ + "/ID").setValue(postId);
 939                         }
 940                         configuration.getStringValue(sonePrefix + "/Likes/Post/" + postLikeCounter + "/ID").setValue(null);
 941
 942                         /* save reply likes. */
 943                         int replyLikeCounter = 0;
 944                         for (String replyId : sone.getLikedReplyIds()) {
 945                                 configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter++ + "/ID").setValue(replyId);
 946                         }
 947                         configuration.getStringValue(sonePrefix + "/Likes/Reply/" + replyLikeCounter + "/ID").setValue(null);
 948
 949                         /* save friends. */
 950                         int friendCounter = 0;
 951                         for (String friendId : sone.getFriends()) {
 952                                 configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter++ + "/ID").setValue(friendId);
 953                         }
 954                         configuration.getStringValue(sonePrefix + "/Friends/" + friendCounter + "/ID").setValue(null);
 955
 956                         logger.log(Level.INFO, "Sone %s saved.", sone);
 957                 } catch (ConfigurationException ce1) {
 958                         logger.log(Level.WARNING, "Could not save Sone: " + sone, ce1);
 959                 }
 960         }
 961
 962         /**
 963          * Creates a new post.
 964          *
 965          * @param sone
 966          *            The Sone that creates the post
 967          * @param text
 968          *            The text of the post
 969          */
 970         public void createPost(Sone sone, String text) {
 971                 createPost(sone, System.currentTimeMillis(), text);
 972         }
 973
 974         /**
 975          * Creates a new post.
 976          *
 977          * @param sone
 978          *            The Sone that creates the post
 979          * @param time
 980          *            The time of the post
 981          * @param text
 982          *            The text of the post
 983          */
 984         public void createPost(Sone sone, long time, String text) {
 985                 if (!isLocalSone(sone)) {
 986                         logger.log(Level.FINE, "Tried to create post for non-local Sone: %s", sone);
 987                         return;
 988                 }
 989                 Post post = new Post(sone, time, text);
 990                 synchronized (posts) {
 991                         posts.put(post.getId(), post);
 992                 }
 993                 synchronized (newPosts) {
 994                         knownPosts.add(post.getId());
 995                 }
 996                 sone.addPost(post);
 997                 saveSone(sone);
 998         }
 999
1000         /**
1001          * Deletes the given post.
1002          *
1003          * @param post
1004          *            The post to delete
1005          */
1006         public void deletePost(Post post) {
1007                 if (!isLocalSone(post.getSone())) {
1008                         logger.log(Level.WARNING, "Tried to delete post of non-local Sone: %s", post.getSone());
1009                         return;
1010                 }
1011                 post.getSone().removePost(post);
1012                 synchronized (posts) {
1013                         posts.remove(post.getId());
1014                 }
1015                 saveSone(post.getSone());
1016         }
1017
1018         /**
1019          * Creates a new reply.
1020          *
1021          * @param sone
1022          *            The Sone that creates the reply
1023          * @param post
1024          *            The post that this reply refers to
1025          * @param text
1026          *            The text of the reply
1027          * @return The created reply
1028          */
1029         public Reply createReply(Sone sone, Post post, String text) {
1030                 return createReply(sone, post, System.currentTimeMillis(), text);
1031         }
1032
1033         /**
1034          * Creates a new reply.
1035          *
1036          * @param sone
1037          *            The Sone that creates the reply
1038          * @param post
1039          *            The post that this reply refers to
1040          * @param time
1041          *            The time of the reply
1042          * @param text
1043          *            The text of the reply
1044          * @return The created reply
1045          */
1046         public Reply createReply(Sone sone, Post post, long time, String text) {
1047                 if (!isLocalSone(sone)) {
1048                         logger.log(Level.FINE, "Tried to create reply for non-local Sone: %s", sone);
1049                         return null;
1050                 }
1051                 Reply reply = new Reply(sone, post, System.currentTimeMillis(), text);
1052                 synchronized (replies) {
1053                         replies.put(reply.getId(), reply);
1054                 }
1055                 synchronized (newReplies) {
1056                         knownReplies.add(reply.getId());
1057                 }
1058                 sone.addReply(reply);
1059                 saveSone(sone);
1060                 return reply;
1061         }
1062
1063         /**
1064          * Deletes the given reply.
1065          *
1066          * @param reply
1067          *            The reply to delete
1068          */
1069         public void deleteReply(Reply reply) {
1070                 Sone sone = reply.getSone();
1071                 if (!isLocalSone(sone)) {
1072                         logger.log(Level.FINE, "Tried to delete non-local reply: %s", reply);
1073                         return;
1074                 }
1075                 synchronized (replies) {
1076                         replies.remove(reply.getId());
1077                 }
1078                 sone.removeReply(reply);
1079                 saveSone(sone);
1080         }
1081
1082         /**
1083          * Starts the core.
1084          */
1085         public void start() {
1086                 loadConfiguration();
1087         }
1088
1089         /**
1090          * Stops the core.
1091          */
1092         public void stop() {
1093                 synchronized (localSones) {
1094                         for (SoneInserter soneInserter : soneInserters.values()) {
1095                                 soneInserter.stop();
1096                         }
1097                 }
1098                 saveConfiguration();
1099         }
1100
1101         //
1102         // PRIVATE METHODS
1103         //
1104
1105         /**
1106          * Loads the configuration.
1107          */
1108         @SuppressWarnings("unchecked")
1109         private void loadConfiguration() {
1110                 /* create options. */
1111                 options.addIntegerOption("InsertionDelay", new DefaultOption<Integer>(60, new OptionWatcher<Integer>() {
1112
1113                         @Override
1114                         public void optionChanged(Option<Integer> option, Integer oldValue, Integer newValue) {
1115                                 SoneInserter.setInsertionDelay(newValue);
1116                         }
1117
1118                 }));
1119                 options.addBooleanOption("ClearOnNextRestart", new DefaultOption<Boolean>(false));
1120                 options.addBooleanOption("ReallyClearOnNextRestart", new DefaultOption<Boolean>(false));
1121
1122                 /* read options from configuration. */
1123                 options.getBooleanOption("ClearOnNextRestart").set(configuration.getBooleanValue("Option/ClearOnNextRestart").getValue(null));
1124                 options.getBooleanOption("ReallyClearOnNextRestart").set(configuration.getBooleanValue("Option/ReallyClearOnNextRestart").getValue(null));
1125                 boolean clearConfiguration = options.getBooleanOption("ClearOnNextRestart").get() && options.getBooleanOption("ReallyClearOnNextRestart").get();
1126                 options.getBooleanOption("ClearOnNextRestart").set(null);
1127                 options.getBooleanOption("ReallyClearOnNextRestart").set(null);
1128                 if (clearConfiguration) {
1129                         /* stop loading the configuration. */
1130                         return;
1131                 }
1132
1133                 options.getIntegerOption("InsertionDelay").set(configuration.getIntValue("Option/InsertionDelay").getValue(null));
1134
1135                 /* load known Sones. */
1136                 int soneCounter = 0;
1137                 while (true) {
1138                         String knownSoneId = configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").getValue(null);
1139                         if (knownSoneId == null) {
1140                                 break;
1141                         }
1142                         synchronized (newSones) {
1143                                 knownSones.add(knownSoneId);
1144                         }
1145                 }
1146
1147                 /* load known posts. */
1148                 int postCounter = 0;
1149                 while (true) {
1150                         String knownPostId = configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").getValue(null);
1151                         if (knownPostId == null) {
1152                                 break;
1153                         }
1154                         synchronized (newPosts) {
1155                                 knownPosts.add(knownPostId);
1156                         }
1157                 }
1158
1159                 /* load known replies. */
1160                 int replyCounter = 0;
1161                 while (true) {
1162                         String knownReplyId = configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").getValue(null);
1163                         if (knownReplyId == null) {
1164                                 break;
1165                         }
1166                         synchronized (newReplies) {
1167                                 knownReplies.add(knownReplyId);
1168                         }
1169                 }
1170
1171         }
1172
1173         /**
1174          * Saves the current options.
1175          */
1176         private void saveConfiguration() {
1177                 /* store the options first. */
1178                 try {
1179                         configuration.getIntValue("Option/InsertionDelay").setValue(options.getIntegerOption("InsertionDelay").getReal());
1180                         configuration.getBooleanValue("Option/ClearOnNextRestart").setValue(options.getBooleanOption("ClearOnNextRestart").getReal());
1181                         configuration.getBooleanValue("Option/ReallyClearOnNextRestart").setValue(options.getBooleanOption("ReallyClearOnNextRestart").getReal());
1182
1183                         /* save known Sones. */
1184                         int soneCounter = 0;
1185                         synchronized (newSones) {
1186                                 for (String knownSoneId : knownSones) {
1187                                         configuration.getStringValue("KnownSone/" + soneCounter++ + "/ID").setValue(knownSoneId);
1188                                 }
1189                                 configuration.getStringValue("KnownSone/" + soneCounter + "/ID").setValue(null);
1190                         }
1191
1192                         /* save known posts. */
1193                         int postCounter = 0;
1194                         synchronized (newPosts) {
1195                                 for (String knownPostId : knownPosts) {
1196                                         configuration.getStringValue("KnownPosts/" + postCounter++ + "/ID").setValue(knownPostId);
1197                                 }
1198                                 configuration.getStringValue("KnownPosts/" + postCounter + "/ID").setValue(null);
1199                         }
1200
1201                         /* save known replies. */
1202                         int replyCounter = 0;
1203                         synchronized (newReplies) {
1204                                 for (String knownReplyId : knownReplies) {
1205                                         configuration.getStringValue("KnownReplies/" + replyCounter++ + "/ID").setValue(knownReplyId);
1206                                 }
1207                                 configuration.getStringValue("KnownReplies/" + replyCounter + "/ID").setValue(null);
1208                         }
1209
1210                 } catch (ConfigurationException ce1) {
1211                         logger.log(Level.SEVERE, "Could not store configuration!", ce1);
1212                 }
1213         }
1214
1215         /**
1216          * Generate a Sone URI from the given URI and latest edition.
1217          *
1218          * @param uriString
1219          *            The URI to derive the Sone URI from
1220          * @return The derived URI
1221          */
1222         private FreenetURI getSoneUri(String uriString) {
1223                 try {
1224                         FreenetURI uri = new FreenetURI(uriString).setDocName("Sone").setMetaString(new String[0]);
1225                         return uri;
1226                 } catch (MalformedURLException mue1) {
1227                         logger.log(Level.WARNING, "Could not create Sone URI from URI: " + uriString, mue1);
1228                         return null;
1229                 }
1230         }
1231
1232         //
1233         // INTERFACE IdentityListener
1234         //
1235
1236         /**
1237          * {@inheritDoc}
1238          */
1239         @Override
1240         public void ownIdentityAdded(OwnIdentity ownIdentity) {
1241                 logger.log(Level.FINEST, "Adding OwnIdentity: " + ownIdentity);
1242                 if (ownIdentity.hasContext("Sone")) {
1243                         addLocalSone(ownIdentity);
1244                 }
1245         }
1246
1247         /**
1248          * {@inheritDoc}
1249          */
1250         @Override
1251         public void ownIdentityRemoved(OwnIdentity ownIdentity) {
1252                 logger.log(Level.FINEST, "Removing OwnIdentity: " + ownIdentity);
1253         }
1254
1255         /**
1256          * {@inheritDoc}
1257          */
1258         @Override
1259         public void identityAdded(Identity identity) {
1260                 logger.log(Level.FINEST, "Adding Identity: " + identity);
1261                 addRemoteSone(identity);
1262         }
1263
1264         /**
1265          * {@inheritDoc}
1266          */
1267         @Override
1268         public void identityUpdated(final Identity identity) {
1269                 new Thread(new Runnable() {
1270
1271                         @Override
1272                         @SuppressWarnings("synthetic-access")
1273                         public void run() {
1274                                 Sone sone = getRemoteSone(identity.getId());
1275                                 soneDownloader.fetchSone(sone);
1276                         }
1277                 }).start();
1278         }
1279
1280         /**
1281          * {@inheritDoc}
1282          */
1283         @Override
1284         public void identityRemoved(Identity identity) {
1285                 /* TODO */
1286         }
1287
1288 }