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