1 files changed, 128 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/ajax/TagService.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/ajax/TagService.java
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+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/ajax/TagService.java
@@ -0,0 +1,128 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Subsonic is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2009 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.ajax;
+
+import net.sourceforge.subsonic.Logger;
+import net.sourceforge.subsonic.domain.MediaFile;
+import net.sourceforge.subsonic.service.MediaFileService;
+import net.sourceforge.subsonic.service.metadata.MetaData;
+import net.sourceforge.subsonic.service.metadata.MetaDataParser;
+import net.sourceforge.subsonic.service.metadata.MetaDataParserFactory;
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.lang.ObjectUtils;
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * Provides AJAX-enabled services for editing tags in music files.
+ * This class is used by the DWR framework (http://getahead.ltd.uk/dwr/).
+ *
+ * @author Sindre Mehus
+ */
+public class TagService {
+
+    private static final Logger LOG = Logger.getLogger(TagService.class);
+
+    private MetaDataParserFactory metaDataParserFactory;
+    private MediaFileService mediaFileService;
+
+    /**
+     * Updated tags for a given music file.
+     *
+     * @param id     The ID of the music file.
+     * @param track  The track number.
+     * @param artist The artist name.
+     * @param album  The album name.
+     * @param title  The song title.
+     * @param year   The release year.
+     * @param genre  The musical genre.
+     * @return "UPDATED" if the new tags were updated, "SKIPPED" if no update was necessary.
+     *         Otherwise the error message is returned.
+     */
+    public String setTags(int id, String track, String artist, String album, String title, String year, String genre) {
+
+        track = StringUtils.trimToNull(track);
+        artist = StringUtils.trimToNull(artist);
+        album = StringUtils.trimToNull(album);
+        title = StringUtils.trimToNull(title);
+        year = StringUtils.trimToNull(year);
+        genre = StringUtils.trimToNull(genre);
+
+        Integer trackNumber = null;
+        if (track != null) {
+            try {
+                trackNumber = new Integer(track);
+            } catch (NumberFormatException x) {
+                LOG.warn("Illegal track number: " + track, x);
+            }
+        }
+
+        Integer yearNumber = null;
+        if (year != null) {
+            try {
+                yearNumber = new Integer(year);
+            } catch (NumberFormatException x) {
+                LOG.warn("Illegal year: " + year, x);
+            }
+        }
+
+        try {
+
+            MediaFile file = mediaFileService.getMediaFile(id);
+            MetaDataParser parser = metaDataParserFactory.getParser(file.getFile());
+
+            if (!parser.isEditingSupported()) {
+                return "Tag editing of " + FilenameUtils.getExtension(file.getPath()) + " files is not supported.";
+            }
+
+            MetaData existingMetaData = parser.getRawMetaData(file.getFile());
+
+            if (StringUtils.equals(artist, existingMetaData.getArtist()) &&
+                    StringUtils.equals(album, existingMetaData.getAlbumName()) &&
+                    StringUtils.equals(title, existingMetaData.getTitle()) &&
+                    ObjectUtils.equals(yearNumber, existingMetaData.getYear()) &&
+                    StringUtils.equals(genre, existingMetaData.getGenre()) &&
+                    ObjectUtils.equals(trackNumber, existingMetaData.getTrackNumber())) {
+                return "SKIPPED";
+            }
+
+            MetaData newMetaData = new MetaData();
+            newMetaData.setArtist(artist);
+            newMetaData.setAlbumName(album);
+            newMetaData.setTitle(title);
+            newMetaData.setYear(yearNumber);
+            newMetaData.setGenre(genre);
+            newMetaData.setTrackNumber(trackNumber);
+            parser.setMetaData(file, newMetaData);
+            mediaFileService.refreshMediaFile(file);
+            return "UPDATED";
+
+        } catch (Exception x) {
+            LOG.warn("Failed to update tags for " + id, x);
+            return x.getMessage();
+        }
+    }
+
+    public void setMediaFileService(MediaFileService mediaFileService) {
+        this.mediaFileService = mediaFileService;
+    }
+
+    public void setMetaDataParserFactory(MetaDataParserFactory metaDataParserFactory) {
+        this.metaDataParserFactory = metaDataParserFactory;
+    }
+}