aboutsummaryrefslogtreecommitdiff
path: root/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java
diff options
context:
space:
mode:
Diffstat (limited to 'subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java')
-rw-r--r--subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java99
1 files changed, 99 insertions, 0 deletions
diff --git a/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java b/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java
new file mode 100644
index 00000000..221fe889
--- /dev/null
+++ b/subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java
@@ -0,0 +1,99 @@
+/*
+ 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.dao;
+
+import net.sourceforge.subsonic.domain.MediaFile;
+import org.springframework.dao.EmptyResultDataAccessException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Provides database services for ratings.
+ *
+ * @author Sindre Mehus
+ */
+public class RatingDao extends AbstractDao {
+
+ /**
+ * Returns paths for the highest rated music files.
+ *
+ * @param offset Number of files to skip.
+ * @param count Maximum number of files to return.
+ * @return Paths for the highest rated music files.
+ */
+ public List<String> getHighestRated(int offset, int count) {
+ if (count < 1) {
+ return new ArrayList<String>();
+ }
+
+ String sql = "select user_rating.path from user_rating, media_file " +
+ "where user_rating.path=media_file.path and media_file.present " +
+ "group by path " +
+ "order by avg(rating) desc limit " + count + " offset " + offset;
+ return queryForStrings(sql);
+ }
+
+ /**
+ * Sets the rating for a media file and a given user.
+ *
+ * @param username The user name.
+ * @param mediaFile The media file.
+ * @param rating The rating between 1 and 5, or <code>null</code> to remove the rating.
+ */
+ public void setRatingForUser(String username, MediaFile mediaFile, Integer rating) {
+ if (rating != null && (rating < 1 || rating > 5)) {
+ return;
+ }
+
+ update("delete from user_rating where username=? and path=?", username, mediaFile.getPath());
+ if (rating != null) {
+ update("insert into user_rating values(?, ?, ?)", username, mediaFile.getPath(), rating);
+ }
+ }
+
+ /**
+ * Returns the average rating for the given media file.
+ *
+ * @param mediaFile The media file.
+ * @return The average rating, or <code>null</code> if no ratings are set.
+ */
+ public Double getAverageRating(MediaFile mediaFile) {
+ try {
+ return (Double) getJdbcTemplate().queryForObject("select avg(rating) from user_rating where path=?", new Object[]{mediaFile.getPath()}, Double.class);
+ } catch (EmptyResultDataAccessException x) {
+ return null;
+ }
+ }
+
+ /**
+ * Returns the rating for the given user and media file.
+ *
+ * @param username The user name.
+ * @param mediaFile The media file.
+ * @return The rating, or <code>null</code> if no rating is set.
+ */
+ public Integer getRatingForUser(String username, MediaFile mediaFile) {
+ try {
+ return getJdbcTemplate().queryForInt("select rating from user_rating where username=? and path=?", new Object[]{username, mediaFile.getPath()});
+ } catch (EmptyResultDataAccessException x) {
+ return null;
+ }
+ }
+}