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

   1 /*
   2  * Sone - SoneParser.java - Copyright © 2010–2013 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.io.InputStream;
  21 import java.net.MalformedURLException;
  22 import java.util.HashSet;
  23 import java.util.Map;
  24 import java.util.Set;
  25 import java.util.logging.Level;
  26 import java.util.logging.Logger;
  27
  28 import net.pterodactylus.sone.data.Album;
  29 import net.pterodactylus.sone.data.Client;
  30 import net.pterodactylus.sone.data.Image;
  31 import net.pterodactylus.sone.data.Post;
  32 import net.pterodactylus.sone.data.PostReply;
  33 import net.pterodactylus.sone.data.Profile;
  34 import net.pterodactylus.sone.data.Profile.Name;
  35 import net.pterodactylus.sone.data.Sone;
  36 import net.pterodactylus.sone.data.impl.DefaultSone;
  37 import net.pterodactylus.sone.database.ImageBuilder.ImageCreated;
  38 import net.pterodactylus.sone.database.PostBuilder;
  39 import net.pterodactylus.sone.database.PostBuilder.PostCreated;
  40 import net.pterodactylus.sone.database.PostReplyBuilder;
  41 import net.pterodactylus.sone.database.PostReplyBuilder.PostReplyCreated;
  42 import net.pterodactylus.sone.database.memory.MemoryDatabase;
  43 import net.pterodactylus.util.number.Numbers;
  44 import net.pterodactylus.util.xml.SimpleXML;
  45 import net.pterodactylus.util.xml.XML;
  46
  47 import freenet.keys.FreenetURI;
  48
  49 import com.google.common.base.Optional;
  50 import com.google.common.collect.Maps;
  51 import org.w3c.dom.Document;
  52
  53 /**
  54  * Parses the inserted XML representation of a {@link Sone} into a Sone.
  55  *
  56  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  57  */
  58 public class SoneParser {
  59
  60         private static final Logger logger = Logger.getLogger(SoneParser.class.getName());
  61         private static final int MAX_PROTOCOL_VERSION = 0;
  62         private final Core core;
  63
  64         public SoneParser(Core core) {
  65                 this.core = core;
  66         }
  67
  68         /**
  69          * Parses a Sone from the given input stream and creates a new Sone from the
  70          * parsed data.
  71          *
  72          * @param originalSone
  73          *              The Sone to update
  74          * @param soneInputStream
  75          *              The input stream to parse the Sone from
  76          * @return The parsed Sone
  77          * @throws SoneException
  78          *              if a parse error occurs, or the protocol is invalid
  79          */
  80         public Sone parseSone(Sone originalSone, InputStream soneInputStream) throws SoneException {
  81                 /* TODO - impose a size limit? */
  82
  83                 Document document;
  84                 /* XML parsing is not thread-safe. */
  85                 synchronized (this) {
  86                         document = XML.transformToDocument(soneInputStream);
  87                 }
  88                 if (document == null) {
  89                         /* TODO - mark Sone as bad. */
  90                         logger.log(Level.WARNING, String.format("Could not parse XML for Sone %s!", originalSone));
  91                         return null;
  92                 }
  93
  94                 Sone sone = new DefaultSone(new MemoryDatabase(null), originalSone.getId(), originalSone.isLocal()).setIdentity(originalSone.getIdentity());
  95
  96                 SimpleXML soneXml;
  97                 try {
  98                         soneXml = SimpleXML.fromDocument(document);
  99                 } catch (NullPointerException npe1) {
 100                         /* for some reason, invalid XML can cause NPEs. */
 101                         logger.log(Level.WARNING, String.format("XML for Sone %s can not be parsed!", sone), npe1);
 102                         return null;
 103                 }
 104
 105                 Integer protocolVersion = null;
 106                 String soneProtocolVersion = soneXml.getValue("protocol-version", null);
 107                 if (soneProtocolVersion != null) {
 108                         protocolVersion = Numbers.safeParseInteger(soneProtocolVersion);
 109                 }
 110                 if (protocolVersion == null) {
 111                         logger.log(Level.INFO, "No protocol version found, assuming 0.");
 112                         protocolVersion = 0;
 113                 }
 114
 115                 if (protocolVersion < 0) {
 116                         logger.log(Level.WARNING, String.format("Invalid protocol version: %d! Not parsing Sone.", protocolVersion));
 117                         return null;
 118                 }
 119
 120                 /* check for valid versions. */
 121                 if (protocolVersion > MAX_PROTOCOL_VERSION) {
 122                         logger.log(Level.WARNING, String.format("Unknown protocol version: %d! Not parsing Sone.", protocolVersion));
 123                         return null;
 124                 }
 125
 126                 String soneTime = soneXml.getValue("time", null);
 127                 if (soneTime == null) {
 128                         /* TODO - mark Sone as bad. */
 129                         logger.log(Level.WARNING, String.format("Downloaded time for Sone %s was null!", sone));
 130                         return null;
 131                 }
 132                 try {
 133                         sone.setTime(Long.parseLong(soneTime));
 134                 } catch (NumberFormatException nfe1) {
 135                         /* TODO - mark Sone as bad. */
 136                         logger.log(Level.WARNING, String.format("Downloaded Sone %s with invalid time: %s", sone, soneTime));
 137                         return null;
 138                 }
 139
 140                 SimpleXML clientXml = soneXml.getNode("client");
 141                 if (clientXml != null) {
 142                         String clientName = clientXml.getValue("name", null);
 143                         String clientVersion = clientXml.getValue("version", null);
 144                         if ((clientName == null) || (clientVersion == null)) {
 145                                 logger.log(Level.WARNING, String.format("Download Sone %s with client XML but missing name or version!", sone));
 146                                 return null;
 147                         }
 148                         sone.setClient(new Client(clientName, clientVersion));
 149                 }
 150
 151                 String soneRequestUri = soneXml.getValue("request-uri", null);
 152                 if (soneRequestUri != null) {
 153                         try {
 154                                 sone.setRequestUri(new FreenetURI(soneRequestUri));
 155                         } catch (MalformedURLException mue1) {
 156                                 /* TODO - mark Sone as bad. */
 157                                 logger.log(Level.WARNING, String.format("Downloaded Sone %s has invalid request URI: %s", sone, soneRequestUri), mue1);
 158                                 return null;
 159                         }
 160                 }
 161
 162                 if (originalSone.getInsertUri() != null) {
 163                         sone.setInsertUri(originalSone.getInsertUri());
 164                 }
 165
 166                 SimpleXML profileXml = soneXml.getNode("profile");
 167                 if (profileXml == null) {
 168                         /* TODO - mark Sone as bad. */
 169                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no profile!", sone));
 170                         return null;
 171                 }
 172
 173                 /* parse profile. */
 174                 String profileFirstName = profileXml.getValue("first-name", null);
 175                 String profileMiddleName = profileXml.getValue("middle-name", null);
 176                 String profileLastName = profileXml.getValue("last-name", null);
 177                 Integer profileBirthDay = Numbers.safeParseInteger(profileXml.getValue("birth-day", null));
 178                 Integer profileBirthMonth = Numbers.safeParseInteger(profileXml.getValue("birth-month", null));
 179                 Integer profileBirthYear = Numbers.safeParseInteger(profileXml.getValue("birth-year", null));
 180                 Profile profile = new Profile(sone).modify().setName(new Name(profileFirstName, profileMiddleName, profileLastName)).update();
 181                 profile.setBirthDay(profileBirthDay).setBirthMonth(profileBirthMonth).setBirthYear(profileBirthYear);
 182                 /* avatar is processed after images are loaded. */
 183                 String avatarId = profileXml.getValue("avatar", null);
 184
 185                 /* parse profile fields. */
 186                 SimpleXML profileFieldsXml = profileXml.getNode("fields");
 187                 if (profileFieldsXml != null) {
 188                         for (SimpleXML fieldXml : profileFieldsXml.getNodes("field")) {
 189                                 String fieldName = fieldXml.getValue("field-name", null);
 190                                 String fieldValue = fieldXml.getValue("field-value", "");
 191                                 if (fieldName == null) {
 192                                         logger.log(Level.WARNING, String.format("Downloaded profile field for Sone %s with missing data! Name: %s, Value: %s", sone, fieldName, fieldValue));
 193                                         return null;
 194                                 }
 195                                 try {
 196                                         profile.addField(fieldName).setValue(fieldValue);
 197                                 } catch (IllegalArgumentException iae1) {
 198                                         logger.log(Level.WARNING, String.format("Duplicate field: %s", fieldName), iae1);
 199                                         return null;
 200                                 }
 201                         }
 202                 }
 203
 204                 /* parse posts. */
 205                 SimpleXML postsXml = soneXml.getNode("posts");
 206                 Set<Post> posts = new HashSet<Post>();
 207                 if (postsXml == null) {
 208                         /* TODO - mark Sone as bad. */
 209                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no posts!", sone));
 210                 } else {
 211                         for (SimpleXML postXml : postsXml.getNodes("post")) {
 212                                 String postId = postXml.getValue("id", null);
 213                                 String postRecipientId = postXml.getValue("recipient", null);
 214                                 String postTime = postXml.getValue("time", null);
 215                                 String postText = postXml.getValue("text", null);
 216                                 if ((postId == null) || (postTime == null) || (postText == null)) {
 217                                         /* TODO - mark Sone as bad. */
 218                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with missing data! ID: %s, Time: %s, Text: %s", sone, postId, postTime, postText));
 219                                         return null;
 220                                 }
 221                                 try {
 222                                         PostBuilder postBuilder = sone.newPostBuilder();
 223                                         /* TODO - parse time correctly. */
 224                                         postBuilder.withId(postId).withTime(Long.parseLong(postTime)).withText(postText);
 225                                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
 226                                                 postBuilder.to(Optional.of(postRecipientId));
 227                                         }
 228                                         posts.add(postBuilder.build(Optional.<PostCreated>absent()));
 229                                 } catch (NumberFormatException nfe1) {
 230                                         /* TODO - mark Sone as bad. */
 231                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with invalid time: %s", sone, postTime));
 232                                         return null;
 233                                 }
 234                         }
 235                 }
 236
 237                 /* parse replies. */
 238                 SimpleXML repliesXml = soneXml.getNode("replies");
 239                 Set<PostReply> replies = new HashSet<PostReply>();
 240                 if (repliesXml == null) {
 241                         /* TODO - mark Sone as bad. */
 242                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no replies!", sone));
 243                 } else {
 244                         for (SimpleXML replyXml : repliesXml.getNodes("reply")) {
 245                                 String replyId = replyXml.getValue("id", null);
 246                                 String replyPostId = replyXml.getValue("post-id", null);
 247                                 String replyTime = replyXml.getValue("time", null);
 248                                 String replyText = replyXml.getValue("text", null);
 249                                 if ((replyId == null) || (replyPostId == null) || (replyTime == null) || (replyText == null)) {
 250                                         /* TODO - mark Sone as bad. */
 251                                         logger.log(Level.WARNING, String.format("Downloaded reply for Sone %s with missing data! ID: %s, Post: %s, Time: %s, Text: %s", sone, replyId, replyPostId, replyTime, replyText));
 252                                         return null;
 253                                 }
 254                                 try {
 255                                         /* TODO - parse time correctly. */
 256                                         PostReplyBuilder postReplyBuilder = sone.newPostReplyBuilder(replyPostId).withId(replyId).withTime(Long.parseLong(replyTime)).withText(replyText);
 257                                         replies.add(postReplyBuilder.build(Optional.<PostReplyCreated>absent()));
 258                                 } catch (NumberFormatException nfe1) {
 259                                         /* TODO - mark Sone as bad. */
 260                                         logger.log(Level.WARNING, String.format("Downloaded reply for Sone %s with invalid time: %s", sone, replyTime));
 261                                         return null;
 262                                 }
 263                         }
 264                 }
 265
 266                 /* parse liked post IDs. */
 267                 SimpleXML likePostIdsXml = soneXml.getNode("post-likes");
 268                 Set<String> likedPostIds = new HashSet<String>();
 269                 if (likePostIdsXml == null) {
 270                         /* TODO - mark Sone as bad. */
 271                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no post likes!", sone));
 272                 } else {
 273                         for (SimpleXML likedPostIdXml : likePostIdsXml.getNodes("post-like")) {
 274                                 String postId = likedPostIdXml.getValue();
 275                                 likedPostIds.add(postId);
 276                         }
 277                 }
 278
 279                 /* parse liked reply IDs. */
 280                 SimpleXML likeReplyIdsXml = soneXml.getNode("reply-likes");
 281                 Set<String> likedReplyIds = new HashSet<String>();
 282                 if (likeReplyIdsXml == null) {
 283                         /* TODO - mark Sone as bad. */
 284                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no reply likes!", sone));
 285                 } else {
 286                         for (SimpleXML likedReplyIdXml : likeReplyIdsXml.getNodes("reply-like")) {
 287                                 String replyId = likedReplyIdXml.getValue();
 288                                 likedReplyIds.add(replyId);
 289                         }
 290                 }
 291
 292                 /* parse albums. */
 293                 SimpleXML albumsXml = soneXml.getNode("albums");
 294                 Map<String, Album> albums = Maps.newHashMap();
 295                 if (albumsXml != null) {
 296                         for (SimpleXML albumXml : albumsXml.getNodes("album")) {
 297                                 String id = albumXml.getValue("id", null);
 298                                 String parentId = albumXml.getValue("parent", null);
 299                                 String title = albumXml.getValue("title", null);
 300                                 String description = albumXml.getValue("description", "");
 301                                 String albumImageId = albumXml.getValue("album-image", null);
 302                                 if ((id == null) || (title == null) || (description == null)) {
 303                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid album!", sone));
 304                                         return null;
 305                                 }
 306                                 Album parent = sone.getRootAlbum();
 307                                 if (parentId != null) {
 308                                         parent = albums.get(parentId);
 309                                         if (parent == null) {
 310                                                 logger.log(Level.WARNING, String.format("Downloaded Sone %s has album with invalid parent!", sone));
 311                                                 return null;
 312                                         }
 313                                 }
 314                                 Album album = parent.newAlbumBuilder().withId(id).build().modify().setTitle(title).setDescription(description).update();
 315                                 albums.put(album.getId(), album);
 316                                 SimpleXML imagesXml = albumXml.getNode("images");
 317                                 if (imagesXml != null) {
 318                                         for (SimpleXML imageXml : imagesXml.getNodes("image")) {
 319                                                 String imageId = imageXml.getValue("id", null);
 320                                                 String imageCreationTimeString = imageXml.getValue("creation-time", null);
 321                                                 String imageKey = imageXml.getValue("key", null);
 322                                                 String imageTitle = imageXml.getValue("title", null);
 323                                                 String imageDescription = imageXml.getValue("description", "");
 324                                                 String imageWidthString = imageXml.getValue("width", null);
 325                                                 String imageHeightString = imageXml.getValue("height", null);
 326                                                 if ((imageId == null) || (imageCreationTimeString == null) || (imageKey == null) || (imageTitle == null) || (imageWidthString == null) || (imageHeightString == null)) {
 327                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid images!", sone));
 328                                                         return null;
 329                                                 }
 330                                                 long creationTime = Numbers.safeParseLong(imageCreationTimeString, 0L);
 331                                                 int imageWidth = Numbers.safeParseInteger(imageWidthString, 0);
 332                                                 int imageHeight = Numbers.safeParseInteger(imageHeightString, 0);
 333                                                 if ((imageWidth < 1) || (imageHeight < 1)) {
 334                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains image %s with invalid dimensions (%s, %s)!", sone, imageId, imageWidthString, imageHeightString));
 335                                                         return null;
 336                                                 }
 337                                                 Image image = album.newImageBuilder().withId(imageId).at(imageKey).created(creationTime).sized(imageWidth, imageHeight).build(Optional.<ImageCreated>absent());
 338                                                 image = image.modify().setTitle(imageTitle).setDescription(imageDescription).update();
 339                                         }
 340                                 }
 341                                 album.modify().setAlbumImage(albumImageId).update();
 342                         }
 343                 }
 344
 345                 /* process avatar. */
 346                 if (avatarId != null) {
 347                         profile.setAvatar(core.getImage(avatarId).orNull());
 348                 }
 349
 350                 /* okay, apparently everything was parsed correctly. Now import. */
 351                 sone.setProfile(profile);
 352                 sone.setPosts(posts);
 353                 sone.setReplies(replies);
 354                 sone.setLikePostIds(likedPostIds);
 355                 sone.setLikeReplyIds(likedReplyIds);
 356
 357                 return sone;
 358         }
 359 }