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