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

   1 package net.pterodactylus.sone.core;
   2
   3 import static java.util.logging.Logger.getLogger;
   4 import static net.pterodactylus.sone.utils.NumberParsers.parseInt;
   5 import static net.pterodactylus.sone.utils.NumberParsers.parseLong;
   6
   7 import java.io.InputStream;
   8 import java.util.ArrayList;
   9 import java.util.HashMap;
  10 import java.util.HashSet;
  11 import java.util.List;
  12 import java.util.Map;
  13 import java.util.Set;
  14 import java.util.logging.Level;
  15 import java.util.logging.Logger;
  16
  17 import net.pterodactylus.sone.data.Album;
  18 import net.pterodactylus.sone.data.Client;
  19 import net.pterodactylus.sone.data.Image;
  20 import net.pterodactylus.sone.data.Post;
  21 import net.pterodactylus.sone.data.PostReply;
  22 import net.pterodactylus.sone.data.Profile;
  23 import net.pterodactylus.sone.data.Profile.DuplicateField;
  24 import net.pterodactylus.sone.data.Profile.EmptyFieldName;
  25 import net.pterodactylus.sone.data.Sone;
  26 import net.pterodactylus.sone.database.PostBuilder;
  27 import net.pterodactylus.sone.database.PostReplyBuilder;
  28 import net.pterodactylus.sone.database.SoneBuilder;
  29 import net.pterodactylus.util.xml.SimpleXML;
  30 import net.pterodactylus.util.xml.XML;
  31
  32 import org.w3c.dom.Document;
  33
  34 /**
  35  * Parses a {@link Sone} from an XML {@link InputStream}.
  36  *
  37  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  38  */
  39 public class SoneParser {
  40
  41         private static final Logger logger = getLogger("Sone.Parser");
  42         private static final int MAX_PROTOCOL_VERSION = 0;
  43         private final Core core;
  44
  45         public SoneParser(Core core) {
  46                 this.core = core;
  47         }
  48
  49         public Sone parseSone(Sone originalSone, InputStream soneInputStream) throws SoneException {
  50                 /* TODO - impose a size limit? */
  51
  52                 Document document;
  53                 /* XML parsing is not thread-safe. */
  54                 synchronized (this) {
  55                         document = XML.transformToDocument(soneInputStream);
  56                 }
  57                 if (document == null) {
  58                         /* TODO - mark Sone as bad. */
  59                         logger.log(Level.WARNING, String.format("Could not parse XML for Sone %s!", originalSone));
  60                         return null;
  61                 }
  62
  63                 SoneBuilder soneBuilder = core.soneBuilder().from(originalSone.getIdentity());
  64                 if (originalSone.isLocal()) {
  65                         soneBuilder = soneBuilder.local();
  66                 }
  67                 Sone sone = soneBuilder.build();
  68
  69                 SimpleXML soneXml;
  70                 try {
  71                         soneXml = SimpleXML.fromDocument(document);
  72                 } catch (NullPointerException npe1) {
  73                         /* for some reason, invalid XML can cause NPEs. */
  74                         logger.log(Level.WARNING, String.format("XML for Sone %s can not be parsed!", sone), npe1);
  75                         return null;
  76                 }
  77
  78                 Integer protocolVersion = null;
  79                 String soneProtocolVersion = soneXml.getValue("protocol-version", null);
  80                 if (soneProtocolVersion != null) {
  81                         protocolVersion = parseInt(soneProtocolVersion, null);
  82                 }
  83                 if (protocolVersion == null) {
  84                         logger.log(Level.INFO, "No protocol version found, assuming 0.");
  85                         protocolVersion = 0;
  86                 }
  87
  88                 if (protocolVersion < 0) {
  89                         logger.log(Level.WARNING, String.format("Invalid protocol version: %d! Not parsing Sone.", protocolVersion));
  90                         return null;
  91                 }
  92
  93                 /* check for valid versions. */
  94                 if (protocolVersion > MAX_PROTOCOL_VERSION) {
  95                         logger.log(Level.WARNING, String.format("Unknown protocol version: %d! Not parsing Sone.", protocolVersion));
  96                         return null;
  97                 }
  98
  99                 String soneTime = soneXml.getValue("time", null);
 100                 if (soneTime == null) {
 101                         /* TODO - mark Sone as bad. */
 102                         logger.log(Level.WARNING, String.format("Downloaded time for Sone %s was null!", sone));
 103                         return null;
 104                 }
 105                 try {
 106                         sone.setTime(Long.parseLong(soneTime));
 107                 } catch (NumberFormatException nfe1) {
 108                         /* TODO - mark Sone as bad. */
 109                         logger.log(Level.WARNING, String.format("Downloaded Sone %s with invalid time: %s", sone, soneTime));
 110                         return null;
 111                 }
 112
 113                 SimpleXML clientXml = soneXml.getNode("client");
 114                 if (clientXml != null) {
 115                         String clientName = clientXml.getValue("name", null);
 116                         String clientVersion = clientXml.getValue("version", null);
 117                         if ((clientName == null) || (clientVersion == null)) {
 118                                 logger.log(Level.WARNING, String.format("Download Sone %s with client XML but missing name or version!", sone));
 119                                 return null;
 120                         }
 121                         sone.setClient(new Client(clientName, clientVersion));
 122                 }
 123
 124                 SimpleXML profileXml = soneXml.getNode("profile");
 125                 if (profileXml == null) {
 126                         /* TODO - mark Sone as bad. */
 127                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no profile!", sone));
 128                         return null;
 129                 }
 130
 131                 /* parse profile. */
 132                 String profileFirstName = profileXml.getValue("first-name", null);
 133                 String profileMiddleName = profileXml.getValue("middle-name", null);
 134                 String profileLastName = profileXml.getValue("last-name", null);
 135                 Integer profileBirthDay = parseInt(profileXml.getValue("birth-day", ""), null);
 136                 Integer profileBirthMonth = parseInt(profileXml.getValue("birth-month", ""), null);
 137                 Integer profileBirthYear = parseInt(profileXml.getValue("birth-year", ""), null);
 138                 Profile profile = new Profile(sone).setFirstName(profileFirstName).setMiddleName(profileMiddleName).setLastName(profileLastName);
 139                 profile.setBirthDay(profileBirthDay).setBirthMonth(profileBirthMonth).setBirthYear(profileBirthYear);
 140                 /* avatar is processed after images are loaded. */
 141                 String avatarId = profileXml.getValue("avatar", null);
 142
 143                 /* parse profile fields. */
 144                 SimpleXML profileFieldsXml = profileXml.getNode("fields");
 145                 if (profileFieldsXml != null) {
 146                         for (SimpleXML fieldXml : profileFieldsXml.getNodes("field")) {
 147                                 String fieldName = fieldXml.getValue("field-name", null);
 148                                 String fieldValue = fieldXml.getValue("field-value", "");
 149                                 if (fieldName == null) {
 150                                         logger.log(Level.WARNING, String.format("Downloaded profile field for Sone %s with missing data! Name: %s, Value: %s", sone, fieldName, fieldValue));
 151                                         return null;
 152                                 }
 153                                 try {
 154                                         profile.addField(fieldName.trim()).setValue(fieldValue);
 155                                 } catch (EmptyFieldName efn1) {
 156                                         logger.log(Level.WARNING, "Empty field name!", efn1);
 157                                         return null;
 158                                 } catch (DuplicateField df1) {
 159                                         logger.log(Level.WARNING, String.format("Duplicate field: %s", fieldName), df1);
 160                                         return null;
 161                                 }
 162                         }
 163                 }
 164
 165                 /* parse posts. */
 166                 SimpleXML postsXml = soneXml.getNode("posts");
 167                 Set<Post> posts = new HashSet<Post>();
 168                 if (postsXml == null) {
 169                         /* TODO - mark Sone as bad. */
 170                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no posts!", sone));
 171                 } else {
 172                         for (SimpleXML postXml : postsXml.getNodes("post")) {
 173                                 String postId = postXml.getValue("id", null);
 174                                 String postRecipientId = postXml.getValue("recipient", null);
 175                                 String postTime = postXml.getValue("time", null);
 176                                 String postText = postXml.getValue("text", null);
 177                                 if ((postId == null) || (postTime == null) || (postText == null)) {
 178                                         /* TODO - mark Sone as bad. */
 179                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with missing data! ID: %s, Time: %s, Text: %s", sone, postId, postTime, postText));
 180                                         return null;
 181                                 }
 182                                 try {
 183                                         PostBuilder postBuilder = core.postBuilder();
 184                                         /* TODO - parse time correctly. */
 185                                         postBuilder.withId(postId).from(sone.getId()).withTime(Long.parseLong(postTime)).withText(postText);
 186                                         if ((postRecipientId != null) && (postRecipientId.length() == 43)) {
 187                                                 postBuilder.to(postRecipientId);
 188                                         }
 189                                         posts.add(postBuilder.build());
 190                                 } catch (NumberFormatException nfe1) {
 191                                         /* TODO - mark Sone as bad. */
 192                                         logger.log(Level.WARNING, String.format("Downloaded post for Sone %s with invalid time: %s", sone, postTime));
 193                                         return null;
 194                                 }
 195                         }
 196                 }
 197
 198                 /* parse replies. */
 199                 SimpleXML repliesXml = soneXml.getNode("replies");
 200                 Set<PostReply> replies = new HashSet<PostReply>();
 201                 if (repliesXml == null) {
 202                         /* TODO - mark Sone as bad. */
 203                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no replies!", sone));
 204                 } else {
 205                         for (SimpleXML replyXml : repliesXml.getNodes("reply")) {
 206                                 String replyId = replyXml.getValue("id", null);
 207                                 String replyPostId = replyXml.getValue("post-id", null);
 208                                 String replyTime = replyXml.getValue("time", null);
 209                                 String replyText = replyXml.getValue("text", null);
 210                                 if ((replyId == null) || (replyPostId == null) || (replyTime == null) || (replyText == null)) {
 211                                         /* TODO - mark Sone as bad. */
 212                                         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));
 213                                         return null;
 214                                 }
 215                                 try {
 216                                         PostReplyBuilder postReplyBuilder = core.postReplyBuilder();
 217                                         /* TODO - parse time correctly. */
 218                                         postReplyBuilder.withId(replyId).from(sone.getId()).to(replyPostId).withTime(Long.parseLong(replyTime)).withText(replyText);
 219                                         replies.add(postReplyBuilder.build());
 220                                 } catch (NumberFormatException nfe1) {
 221                                         /* TODO - mark Sone as bad. */
 222                                         logger.log(Level.WARNING, String.format("Downloaded reply for Sone %s with invalid time: %s", sone, replyTime));
 223                                         return null;
 224                                 }
 225                         }
 226                 }
 227
 228                 /* parse liked post IDs. */
 229                 SimpleXML likePostIdsXml = soneXml.getNode("post-likes");
 230                 Set<String> likedPostIds = new HashSet<String>();
 231                 if (likePostIdsXml == null) {
 232                         /* TODO - mark Sone as bad. */
 233                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no post likes!", sone));
 234                 } else {
 235                         for (SimpleXML likedPostIdXml : likePostIdsXml.getNodes("post-like")) {
 236                                 String postId = likedPostIdXml.getValue();
 237                                 likedPostIds.add(postId);
 238                         }
 239                 }
 240
 241                 /* parse liked reply IDs. */
 242                 SimpleXML likeReplyIdsXml = soneXml.getNode("reply-likes");
 243                 Set<String> likedReplyIds = new HashSet<String>();
 244                 if (likeReplyIdsXml == null) {
 245                         /* TODO - mark Sone as bad. */
 246                         logger.log(Level.WARNING, String.format("Downloaded Sone %s has no reply likes!", sone));
 247                 } else {
 248                         for (SimpleXML likedReplyIdXml : likeReplyIdsXml.getNodes("reply-like")) {
 249                                 String replyId = likedReplyIdXml.getValue();
 250                                 likedReplyIds.add(replyId);
 251                         }
 252                 }
 253
 254                 /* parse albums. */
 255                 SimpleXML albumsXml = soneXml.getNode("albums");
 256                 Map<String, Image> allImages = new HashMap<String, Image>();
 257                 List<Album> topLevelAlbums = new ArrayList<Album>();
 258                 if (albumsXml != null) {
 259                         for (SimpleXML albumXml : albumsXml.getNodes("album")) {
 260                                 String id = albumXml.getValue("id", null);
 261                                 String parentId = albumXml.getValue("parent", null);
 262                                 String title = albumXml.getValue("title", null);
 263                                 String description = albumXml.getValue("description", "");
 264                                 String albumImageId = albumXml.getValue("album-image", null);
 265                                 if ((id == null) || (title == null)) {
 266                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid album!", sone));
 267                                         return null;
 268                                 }
 269                                 Album parent = null;
 270                                 if (parentId != null) {
 271                                         parent = core.getAlbum(parentId);
 272                                         if (parent == null) {
 273                                                 logger.log(Level.WARNING, String.format("Downloaded Sone %s has album with invalid parent!", sone));
 274                                                 return null;
 275                                         }
 276                                 }
 277                                 Album album = core.albumBuilder()
 278                                                 .withId(id)
 279                                                 .by(sone)
 280                                                 .build()
 281                                                 .modify()
 282                                                 .setTitle(title)
 283                                                 .setDescription(description)
 284                                                 .update();
 285                                 if (parent != null) {
 286                                         parent.addAlbum(album);
 287                                 } else {
 288                                         topLevelAlbums.add(album);
 289                                 }
 290                                 SimpleXML imagesXml = albumXml.getNode("images");
 291                                 if (imagesXml != null) {
 292                                         for (SimpleXML imageXml : imagesXml.getNodes("image")) {
 293                                                 String imageId = imageXml.getValue("id", null);
 294                                                 String imageCreationTimeString = imageXml.getValue("creation-time", null);
 295                                                 String imageKey = imageXml.getValue("key", null);
 296                                                 String imageTitle = imageXml.getValue("title", null);
 297                                                 String imageDescription = imageXml.getValue("description", "");
 298                                                 String imageWidthString = imageXml.getValue("width", null);
 299                                                 String imageHeightString = imageXml.getValue("height", null);
 300                                                 if ((imageId == null) || (imageCreationTimeString == null) || (imageKey == null) || (imageTitle == null) || (imageWidthString == null) || (imageHeightString == null)) {
 301                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains invalid images!", sone));
 302                                                         return null;
 303                                                 }
 304                                                 long creationTime = parseLong(imageCreationTimeString, 0L);
 305                                                 int imageWidth = parseInt(imageWidthString, 0);
 306                                                 int imageHeight = parseInt(imageHeightString, 0);
 307                                                 if ((imageWidth < 1) || (imageHeight < 1)) {
 308                                                         logger.log(Level.WARNING, String.format("Downloaded Sone %s contains image %s with invalid dimensions (%s, %s)!", sone, imageId, imageWidthString, imageHeightString));
 309                                                         return null;
 310                                                 }
 311                                                 Image image = core.imageBuilder().withId(imageId).build().modify().setSone(sone).setKey(imageKey).setCreationTime(creationTime).update();
 312                                                 image = image.modify().setTitle(imageTitle).setDescription(imageDescription).update();
 313                                                 image = image.modify().setWidth(imageWidth).setHeight(imageHeight).update();
 314                                                 album.addImage(image);
 315                                                 allImages.put(imageId, image);
 316                                         }
 317                                 }
 318                                 album.modify().setAlbumImage(albumImageId).update();
 319                         }
 320                 }
 321
 322                 /* process avatar. */
 323                 if (avatarId != null) {
 324                         profile.setAvatar(allImages.get(avatarId));
 325                 }
 326
 327                 /* okay, apparently everything was parsed correctly. Now import. */
 328                 /* atomic setter operation on the Sone. */
 329                 synchronized (sone) {
 330                         sone.setProfile(profile);
 331                         sone.setPosts(posts);
 332                         sone.setReplies(replies);
 333                         sone.setLikePostIds(likedPostIds);
 334                         sone.setLikeReplyIds(likedReplyIds);
 335                         for (Album album : topLevelAlbums) {
 336                                 sone.getRootAlbum().addAlbum(album);
 337                         }
 338                 }
 339
 340                 return sone;
 341
 342         }
 343
 344 }