src/main/java/eu/svjatoslav/meviz/htmlindexer/WebIndexer.java

   1 package eu.svjatoslav.meviz.htmlindexer;
   2
   3 import java.io.BufferedInputStream;
   4 import java.io.IOException;
   5 import java.io.ObjectInputStream;
   6 import java.net.MalformedURLException;
   7 import java.net.URL;
   8 import java.util.List;
   9
  10 import eu.svjatoslav.commons.network.UrlParamEncoder;
  11 import eu.svjatoslav.meviz.htmlindexer.layouts.MixedLayout;
  12 import eu.svjatoslav.meviz.htmlindexer.metadata.Dimension;
  13 import eu.svjatoslav.meviz.htmlindexer.metadata.DirectoryMetadata;
  14 import eu.svjatoslav.meviz.htmlindexer.metadata.fileTypes.AbstractFile;
  15 import eu.svjatoslav.meviz.htmlindexer.metadata.fileTypes.Picture;
  16
  17 public class WebIndexer extends AbstractIndexer {
  18
  19         private static final int METADATA_LOAD_TRY_COUNT = 10;
  20         private final String globalPrefix;
  21         private final String jspPath;
  22
  23         public WebIndexer(final String globalPrefix, final String jspPath) {
  24                 this.globalPrefix = globalPrefix;
  25                 this.jspPath = jspPath;
  26         }
  27
  28         @Override
  29         public String getDirectoryUrl(final AbstractFile directory,
  30                         final IndexingContext context) {
  31                 return jspPath + context.getLocalUrl() + "/"
  32                                 + UrlParamEncoder.encode(directory.fileName);
  33         }
  34
  35         public String getHtml(String requestPath) throws MalformedURLException,
  36                         IOException, ClassNotFoundException {
  37
  38                 if (requestPath.equals("/"))
  39                         requestPath = "";
  40
  41                 final MixedLayout layout = new MixedLayout();
  42                 final IndexingContext context = new IndexingContext(globalPrefix,
  43                                 requestPath);
  44                 layout.init("Photos", context.getLocalPathComponents(), this, context);
  45
  46                 final DirectoryMetadata metadata = getMetadataForPath(requestPath);
  47
  48                 compileHtml(layout, metadata);
  49
  50                 return layout.getHtml(false, false);
  51         }
  52
  53         public DirectoryMetadata getMetadataForPath(final String requestPath)
  54                         throws ClassNotFoundException, IOException {
  55
  56                 final StringBuffer urlStringBuffer = new StringBuffer();
  57
  58                 urlStringBuffer.append(globalPrefix);
  59                 urlStringBuffer.append(UrlParamEncoder.encode(requestPath));
  60                 urlStringBuffer.append("/.thumbnails/metadata_6.dat");
  61
  62                 final String urlString = urlStringBuffer.toString();
  63
  64                 IOException exception = null;
  65
  66                 for (int i = 0; i < METADATA_LOAD_TRY_COUNT; i++)
  67                         try {
  68
  69                                 final BufferedInputStream in = new BufferedInputStream(new URL(
  70                                                 urlString).openStream());
  71
  72                                 final ObjectInputStream oin = new ObjectInputStream(in);
  73                                 final DirectoryMetadata directory = (DirectoryMetadata) oin
  74                                                 .readObject();
  75                                 in.close();
  76
  77                                 return directory;
  78                         } catch (final IOException e) {
  79                                 exception = e;
  80                         }
  81
  82                 throw exception;
  83         }
  84
  85         @Override
  86         public String getParentDirectoryUrl(final IndexingContext context) {
  87                 final StringBuffer result = new StringBuffer();
  88
  89                 result.append(jspPath);
  90
  91                 final List<String> components = context.getLocalPathComponents();
  92
  93                 for (final String pathComponent : components.subList(0,
  94                                 components.size() - 1)) {
  95                         result.append("/");
  96                         result.append(pathComponent);
  97                 }
  98
  99                 return result.toString();
 100         }
 101
 102         @Override
 103         public String getThumbnailUrl(final Picture picture,
 104                         final Dimension desiredDimension, final IndexingContext context) {
 105
 106                 // in case thumbnail size was equal to original, then return original
 107                 // file path
 108                 if (picture.getDimensions().equals(desiredDimension))
 109                         return context.getGlobalUrl() + context.getLocalUrl() + "/"
 110                                         + picture.fileName;
 111
 112                 final String thumbnailFileName = picture
 113                                 .getRelativeThumbnailFileName(desiredDimension);
 114
 115                 return context.getGlobalUrl() + context.getLocalUrl() + "/"
 116                                 + Constants.THUMBNAILS_DIRECTORY_NAME + "/"
 117                                 + UrlParamEncoder.encode(thumbnailFileName);
 118         }
 119
 120 }