From a1a18f77a50804e0127dfa4b0f5240c49c541184 Mon Sep 17 00:00:00 2001
From: Scott Jackson <daneren2005@gmail.com>
Date: Mon, 2 Jul 2012 21:24:02 -0700
Subject: Initial Commit

---
 .../net/sourceforge/subsonic/dao/RatingDao.java    | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java

(limited to 'subsonic-main/src/main/java/net/sourceforge/subsonic/dao/RatingDao.java')

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;
+        }
+    }
+}
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