supported/Text.java

   1 package be.nikiroo.fanfix.supported;
   2
   3 import java.io.File;
   4 import java.io.IOException;
   5 import java.io.InputStream;
   6 import java.net.URISyntaxException;
   7 import java.net.URL;
   8 import java.util.AbstractMap;
   9 import java.util.ArrayList;
  10 import java.util.List;
  11 import java.util.Map.Entry;
  12 import java.util.Scanner;
  13
  14 import org.jsoup.nodes.Document;
  15
  16 import be.nikiroo.fanfix.Instance;
  17 import be.nikiroo.fanfix.bundles.Config;
  18 import be.nikiroo.fanfix.data.MetaData;
  19 import be.nikiroo.utils.Image;
  20 import be.nikiroo.utils.ImageUtils;
  21 import be.nikiroo.utils.Progress;
  22 import be.nikiroo.utils.streams.MarkableFileInputStream;
  23
  24 /**
  25  * Support class for local stories encoded in textual format, with a few rules:
  26  * <ul>
  27  * <li>The title must be on the first line</li>
  28  * <li>The author (preceded by nothing, "by " or "©") must be on the second
  29  * line, possibly with the publication date in parenthesis (i.e., "
  30  * <tt>By Unknown (3rd October 1998)</tt>")</li>
  31  * <li>Chapters must be declared with "<tt>Chapter x</tt>" or "
  32  * <tt>Chapter x: NAME OF THE CHAPTER</tt>", where "<tt>x</tt>" is the chapter
  33  * number</li>
  34  * <li>A description of the story must be given as chapter number 0</li>
  35  * <li>A cover may be present, with the same filename but a PNG, JPEG or JPG
  36  * extension</li>
  37  * </ul>
  38  *
  39  * @author niki
  40  */
  41 class Text extends BasicSupport {
  42         private File sourceFile;
  43         private InputStream in;
  44
  45         protected File getSourceFile() {
  46                 return sourceFile;
  47         }
  48
  49         protected InputStream getInput() {
  50                 if (in != null) {
  51                         try {
  52                                 in.reset();
  53                         } catch (IOException e) {
  54                                 Instance.getInstance().getTraceHandler().error(new IOException("Cannot reset the Text stream", e));
  55                         }
  56
  57                         return in;
  58                 }
  59
  60                 return null;
  61         }
  62
  63         @Override
  64         protected boolean isHtml() {
  65                 return false;
  66         }
  67
  68         @Override
  69         protected Document loadDocument(URL source) throws IOException {
  70                 try {
  71                         sourceFile = new File(source.toURI());
  72                         in = new MarkableFileInputStream(sourceFile);
  73                 } catch (URISyntaxException e) {
  74                         throw new IOException("Cannot load the text document: " + source);
  75                 }
  76
  77                 return null;
  78         }
  79
  80         @Override
  81         protected MetaData getMeta() throws IOException {
  82                 MetaData meta = new MetaData();
  83
  84                 meta.setTitle(getTitle());
  85                 meta.setAuthor(getAuthor());
  86                 meta.setDate(bsHelper.formatDate(getDate()));
  87                 meta.setTags(new ArrayList<String>());
  88                 meta.setUrl(getSourceFile().toURI().toURL().toString());
  89                 meta.setUuid(getSourceFile().toString());
  90                 meta.setLuid("");
  91                 meta.setLang(getLang()); // default is EN
  92                 meta.setSubject(getSourceFile().getParentFile().getName());
  93                 meta.setImageDocument(false);
  94                 meta.setCover(getCover(getSourceFile()));
  95
  96                 return meta;
  97         }
  98
  99         private String getLang() {
 100                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 101                 Scanner scan = new Scanner(getInput(), "UTF-8");
 102                 scan.useDelimiter("\\n");
 103                 scan.next(); // Title
 104                 scan.next(); // Author (Date)
 105                 String chapter0 = scan.next(); // empty or Chapter 0
 106                 while (chapter0.isEmpty()) {
 107                         chapter0 = scan.next();
 108                 }
 109
 110                 String lang = detectChapter(chapter0, 0);
 111                 if (lang == null) {
 112                         // No description??
 113                         lang = detectChapter(chapter0, 1);
 114                 }
 115
 116                 if (lang == null) {
 117                         lang = "en";
 118                 } else {
 119                         lang = lang.toLowerCase();
 120                 }
 121
 122                 return lang;
 123         }
 124
 125         private String getTitle() {
 126                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 127                 Scanner scan = new Scanner(getInput(), "UTF-8");
 128                 scan.useDelimiter("\\n");
 129                 return scan.next();
 130         }
 131
 132         private String getAuthor() {
 133                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 134                 Scanner scan = new Scanner(getInput(), "UTF-8");
 135                 scan.useDelimiter("\\n");
 136                 scan.next();
 137                 String authorDate = scan.next();
 138
 139                 String author = authorDate;
 140                 int pos = authorDate.indexOf('(');
 141                 if (pos >= 0) {
 142                         author = authorDate.substring(0, pos);
 143                 }
 144
 145                 return bsHelper.fixAuthor(author);
 146         }
 147
 148         private String getDate() {
 149                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 150                 Scanner scan = new Scanner(getInput(), "UTF-8");
 151                 scan.useDelimiter("\\n");
 152                 scan.next();
 153                 String authorDate = scan.next();
 154
 155                 String date = "";
 156                 int pos = authorDate.indexOf('(');
 157                 if (pos >= 0) {
 158                         date = authorDate.substring(pos + 1).trim();
 159                         pos = date.lastIndexOf(')');
 160                         if (pos >= 0) {
 161                                 date = date.substring(0, pos).trim();
 162                         }
 163                 }
 164
 165                 return date;
 166         }
 167
 168         @Override
 169         protected String getDesc() throws IOException {
 170                 return getChapterContent(null, 0, null).trim();
 171         }
 172
 173         protected Image getCover(File sourceFile) {
 174                 String path = sourceFile.getName();
 175
 176                 for (String ext : new String[] { ".txt", ".text", ".story" }) {
 177                         if (path.endsWith(ext)) {
 178                                 path = path.substring(0, path.length() - ext.length());
 179                         }
 180                 }
 181
 182                 Image cover = bsImages.getImage(this, sourceFile.getParentFile(), path);
 183                 if (cover != null) {
 184                         try {
 185                                 File tmp = Instance.getInstance().getTempFiles().createTempFile("test_cover_image");
 186                                 ImageUtils.getInstance().saveAsImage(cover, tmp, "png");
 187                                 tmp.delete();
 188                         } catch (IOException e) {
 189                                 cover = null;
 190                         }
 191                 }
 192
 193                 return cover;
 194         }
 195
 196         @Override
 197         protected List<Entry<String, URL>> getChapters(Progress pg)
 198                         throws IOException {
 199                 List<Entry<String, URL>> chaps = new ArrayList<Entry<String, URL>>();
 200                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 201                 Scanner scan = new Scanner(getInput(), "UTF-8");
 202                 scan.useDelimiter("\\n");
 203                 String line = "first is not empty";
 204                 while (scan.hasNext()) {
 205                         boolean prevLineEmpty = line.trim().isEmpty();
 206                         line = scan.next();
 207                         if (prevLineEmpty && detectChapter(line, chaps.size() + 1) != null) {
 208                                 String chapName = Integer.toString(chaps.size() + 1);
 209                                 int pos = line.indexOf(':');
 210                                 if (pos >= 0 && pos + 1 < line.length()) {
 211                                         chapName = line.substring(pos + 1).trim();
 212                                 }
 213
 214                                 chaps.add(new AbstractMap.SimpleEntry<String, URL>(//
 215                                                 chapName, //
 216                                                 getSourceFile().toURI().toURL()));
 217                         }
 218                 }
 219
 220                 return chaps;
 221         }
 222
 223         @Override
 224         protected String getChapterContent(URL source, int number, Progress pg)
 225                         throws IOException {
 226                 StringBuilder builder = new StringBuilder();
 227                 @SuppressWarnings("resource") // cannot close, or we loose getInput()!
 228                 Scanner scan = new Scanner(getInput(), "UTF-8");
 229                 scan.useDelimiter("\\n");
 230                 scan.next(); // title
 231                 scan.next(); // author
 232                 scan.next(); // date or empty
 233                 Boolean inChap = null;
 234                 String line = "";
 235                 while (scan.hasNext()) {
 236                         if (number == 0 && !line.trim().isEmpty()) {
 237                                 // We found pre-chapter content, we are checking for
 238                                 // Chapter 0 (fake chapter) --> keep the content
 239                                 if (inChap == null)
 240                                         inChap = true;
 241                         }
 242                         line = scan.next();
 243                         if ((inChap == null || !inChap) && detectChapter(line, number) != null) {
 244                                 inChap = true;
 245                         } else if (detectChapter(line, number + 1) != null) {
 246                                 break;
 247                         } else if (inChap != null && inChap) {
 248                                 builder.append(line);
 249                                 builder.append("\n");
 250                         }
 251                 }
 252
 253                 return builder.toString();
 254         }
 255
 256         @Override
 257         protected void close() {
 258                 InputStream in = getInput();
 259                 if (in != null) {
 260                         try {
 261                                 in.close();
 262                         } catch (IOException e) {
 263                                 Instance.getInstance().getTraceHandler()
 264                                                 .error(new IOException("Cannot close the text source file input", e));
 265                         }
 266                 }
 267
 268                 super.close();
 269         }
 270
 271         @Override
 272         protected boolean supports(URL url) {
 273                 return supports(url, false);
 274         }
 275
 276         /**
 277          * Check if we supports this {@link URL}, that is, if the info file can be
 278          * found OR not found.
 279          * <p>
 280          * It must also be a file, not another kind of URL.
 281          *
 282          * @param url
 283          *            the {@link URL} to check
 284          * @param info
 285          *            TRUE to require the info file, FALSE to forbid the info file
 286          *
 287          * @return TRUE if it is supported
 288          */
 289         protected boolean supports(URL url, boolean info) {
 290                 if (!"file".equals(url.getProtocol())) {
 291                         return false;
 292                 }
 293
 294                 boolean infoPresent = false;
 295                 File file;
 296                 try {
 297                         file = new File(url.toURI());
 298                         file = assureNoTxt(file);
 299                         file = new File(file.getPath() + ".info");
 300                 } catch (URISyntaxException e) {
 301                         Instance.getInstance().getTraceHandler().error(e);
 302                         file = null;
 303                 }
 304
 305                 infoPresent = (file != null && file.exists());
 306
 307                 return infoPresent == info;
 308         }
 309
 310         /**
 311          * Remove the ".txt" (or ".text") extension if it is present.
 312          *
 313          * @param file
 314          *            the file to process
 315          *
 316          * @return the same file or a copy of it without the ".txt" extension if it
 317          *         was present
 318          */
 319         protected File assureNoTxt(File file) {
 320                 for (String ext : new String[] { ".txt", ".text" }) {
 321                         if (file.getName().endsWith(ext)) {
 322                                 file = new File(file.getPath().substring(0,
 323                                                 file.getPath().length() - ext.length()));
 324                         }
 325                 }
 326
 327                 return file;
 328         }
 329
 330         /**
 331          * Check if the given line looks like the given starting chapter in a
 332          * supported language, and return the language if it does (or NULL if not).
 333          *
 334          * @param line
 335          *            the line to check
 336          * @param number
 337          *            the specific chapter number to check for
 338          *
 339          * @return the language or NULL
 340          */
 341         static private String detectChapter(String line, int number) {
 342                 line = line.toUpperCase();
 343                 for (String lang : Instance.getInstance().getConfig().getList(Config.CONF_CHAPTER)) {
 344                         String chapter = Instance.getInstance().getConfig().getStringX(Config.CONF_CHAPTER, lang);
 345                         if (chapter != null && !chapter.isEmpty()) {
 346                                 chapter = chapter.toUpperCase() + " ";
 347                                 if (line.startsWith(chapter)) {
 348                                         // We want "[CHAPTER] [number]: [name]", with ": [name]"
 349                                         // optional
 350                                         String test = line.substring(chapter.length()).trim();
 351
 352                                         String possibleNum = test.trim();
 353                                         if (possibleNum.indexOf(':') > 0) {
 354                                                 possibleNum = possibleNum.substring(0,
 355                                                                 possibleNum.indexOf(':')).trim();
 356                                         }
 357
 358                                         if (test.startsWith(Integer.toString(number))) {
 359                                                 test = test
 360                                                                 .substring(Integer.toString(number).length())
 361                                                                 .trim();
 362                                                 if (test.isEmpty() || test.startsWith(":")) {
 363                                                         return lang;
 364                                                 }
 365                                         }
 366                                 }
 367                         }
 368                 }
 369
 370                 return null;
 371         }
 372 }