content: /*
   This file is part of Airsonic.
  
   Airsonic 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.
  
   Airsonic 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 Airsonic.  If not, see <http://www.gnu.org/licenses/>.
  
   Copyright 2016 (C) Airsonic Authors
   Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
   */
  package org.airsonic.player.dao;
  
  import org.airsonic.player.domain.Genre;
  import org.airsonic.player.domain.MediaFile;
  import org.airsonic.player.domain.MusicFolder;
  import org.airsonic.player.domain.RandomSearchCriteria;
  import org.airsonic.player.util.Util;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.jdbc.core.RowMapper;
  import org.springframework.stereotype.Repository;
  import org.springframework.transaction.annotation.Transactional;
  
  import java.io.File;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import java.util.*;
  
  /**
   * Provides database services for media files.
   *
   * @author Sindre Mehus
   */
  @Repository
  public class MediaFileDao extends AbstractDao {
      private static final Logger LOG = LoggerFactory.getLogger(MediaFileDao.class);
      private static final String INSERT_COLUMNS = "path, folder, type, format, title, album, artist, album_artist, disc_number, " +
                                                  "track_number, year, genre, bit_rate, variable_bit_rate, duration_seconds, file_size, width, height, cover_art_path, " +
                                                  "parent_path, play_count, last_played, comment, created, changed, last_scanned, children_last_updated, present, " +
                                                  "version, mb_release_id, mb_recording_id";
  
      private static final String QUERY_COLUMNS = "id, " + INSERT_COLUMNS;
      private static final String GENRE_COLUMNS = "name, song_count, album_count";
  
      public static final int VERSION = 4;
  
      private final RowMapper<MediaFile> rowMapper = new MediaFileMapper();
      private final RowMapper<MediaFile> musicFileInfoRowMapper = new MusicFileInfoMapper();
      private final RowMapper<Genre> genreRowMapper = new GenreMapper();
  
      /**
       * Returns the media file for the given path.
       *
       * @param path The path.
       * @return The media file or null.
       */
      public MediaFile getMediaFile(String path) {
          return queryOne("select " + QUERY_COLUMNS + " from media_file where path=?", rowMapper, path);
      }
  
      /**
       * Returns the media file for the given ID.
       *
       * @param id The ID.
       * @return The media file or null.
       */
      public MediaFile getMediaFile(int id) {
          return queryOne("select " + QUERY_COLUMNS + " from media_file where id=?", rowMapper, id);
      }
  
      /**
       * Returns the media file that are direct children of the given path.
       *
       * @param path The path.
       * @return The list of children.
       */
      public List<MediaFile> getChildrenOf(String path) {
          return query("select " + QUERY_COLUMNS + " from media_file where parent_path=? and present", rowMapper, path);
      }
  
      public List<MediaFile> getFilesInPlaylist(int playlistId) {
          return query("select " + prefix(QUERY_COLUMNS, "media_file") + " from playlist_file, media_file where " +
                       "media_file.id = playlist_file.media_file_id and " +
                       "playlist_file.playlist_id = ? " +
                       "order by playlist_file.id", rowMapper, playlistId);
      }
  
      public List<MediaFile> getSongsForAlbum(String artist, String album) {
          return query("select " + QUERY_COLUMNS + " from media_file where album_artist=? and album=? and present " +
                       "and type in (?,?,?) order by disc_number, track_number", rowMapper,
                       artist, album, MediaFile.MediaType.MUSIC.name(), MediaFile.MediaType.AUDIOBOOK.name(), MediaFile.MediaType.PODCAST.name());
      }
  
      public List<MediaFile> getVideos(final int count, final int offset, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.VIDEO.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + QUERY_COLUMNS
                            + " from media_file where type = :type and present and folder in (:folders) " +
                            "order by title limit :count offset :offset", rowMapper, args);
      }
  
      public MediaFile getArtistByName(final String name, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return null;
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.DIRECTORY.name());
          args.put("name", name);
          args.put("folders", MusicFolder.toPathList(musicFolders));
          return namedQueryOne("select " + QUERY_COLUMNS + " from media_file where type = :type and artist = :name " +
                               "and present and folder in (:folders)", rowMapper, args);
      }
  
      /**
       * Creates or updates a media file.
       *
       * @param file The media file to create/update.
       */
      @Transactional
      public void createOrUpdateMediaFile(MediaFile file) {
          LOG.trace("Creating/Updating new media file at {}", file.getPath());
          String sql = "update media_file set " +
                       "folder=?," +
                       "type=?," +
                       "format=?," +
                       "title=?," +
                       "album=?," +
                       "artist=?," +
                       "album_artist=?," +
                       "disc_number=?," +
                       "track_number=?," +
                       "year=?," +
                       "genre=?," +
                       "bit_rate=?," +
                       "variable_bit_rate=?," +
                       "duration_seconds=?," +
                       "file_size=?," +
                       "width=?," +
                       "height=?," +
                       "cover_art_path=?," +
                       "parent_path=?," +
                       "play_count=?," +
                       "last_played=?," +
                       "comment=?," +
                       "changed=?," +
                       "last_scanned=?," +
                       "children_last_updated=?," +
                       "present=?, " +
                       "version=?, " +
                       "mb_release_id=?, " +
                       "mb_recording_id=? " +
                       "where path=?";
  
          LOG.trace("Updating media file {}", Util.debugObject(file));
  
          int n = update(sql,
                         file.getFolder(), file.getMediaType().name(), file.getFormat(), file.getTitle(), file.getAlbumName(), file.getArtist(),
                         file.getAlbumArtist(), file.getDiscNumber(), file.getTrackNumber(), file.getYear(), file.getGenre(), file.getBitRate(),
                         file.isVariableBitRate(), file.getDurationSeconds(), file.getFileSize(), file.getWidth(), file.getHeight(),
                         file.getCoverArtPath(), file.getParentPath(), file.getPlayCount(), file.getLastPlayed(), file.getComment(),
                         file.getChanged(), file.getLastScanned(), file.getChildrenLastUpdated(), file.isPresent(), VERSION,
                         file.getMusicBrainzReleaseId(), file.getMusicBrainzRecordingId(), file.getPath());
  
          if (n == 0) {
  
              // Copy values from obsolete table music_file_info.
              MediaFile musicFileInfo = getMusicFileInfo(file.getPath());
              if (musicFileInfo != null) {
                  file.setComment(musicFileInfo.getComment());
                  file.setLastPlayed(musicFileInfo.getLastPlayed());
                  file.setPlayCount(musicFileInfo.getPlayCount());
              }
  
              update("insert into media_file (" + INSERT_COLUMNS + ") values (" + questionMarks(INSERT_COLUMNS) + ")",
                     file.getPath(), file.getFolder(), file.getMediaType().name(), file.getFormat(), file.getTitle(), file.getAlbumName(), file.getArtist(),
                     file.getAlbumArtist(), file.getDiscNumber(), file.getTrackNumber(), file.getYear(), file.getGenre(), file.getBitRate(),
                     file.isVariableBitRate(), file.getDurationSeconds(), file.getFileSize(), file.getWidth(), file.getHeight(),
                     file.getCoverArtPath(), file.getParentPath(), file.getPlayCount(), file.getLastPlayed(), file.getComment(),
                     file.getCreated(), file.getChanged(), file.getLastScanned(),
                     file.getChildrenLastUpdated(), file.isPresent(), VERSION, file.getMusicBrainzReleaseId(), file.getMusicBrainzRecordingId());
          }
  
          int id = queryForInt("select id from media_file where path=?", null, file.getPath());
          file.setId(id);
      }
  
      private MediaFile getMusicFileInfo(String path) {
          return queryOne("select play_count, last_played, comment from music_file_info where path=?", musicFileInfoRowMapper, path);
      }
  
      public void deleteMediaFile(String path) {
          update("update media_file set present=false, children_last_updated=? where path=?", new Date(0L), path);
      }
  
      public List<Genre> getGenres(boolean sortByAlbum) {
          String orderBy = sortByAlbum ? "album_count" : "song_count";
          return query("select " + GENRE_COLUMNS + " from genre order by " + orderBy + " desc", genreRowMapper);
      }
  
      public void updateGenres(List<Genre> genres) {
          update("delete from genre");
          for (Genre genre : genres) {
              update("insert into genre(" + GENRE_COLUMNS + ") values(?, ?, ?)",
                     genre.getName(), genre.getSongCount(), genre.getAlbumCount());
          }
      }
  
      /**
       * Returns the most frequently played albums.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param musicFolders Only return albums in these folders.
       * @return The most frequently played albums.
       */
      public List<MediaFile> getMostFrequentlyPlayedAlbums(final int offset, final int count, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
  
          return namedQuery("select " + QUERY_COLUMNS
                            + " from media_file where type = :type and play_count > 0 and present and folder in (:folders) " +
                            "order by play_count desc limit :count offset :offset", rowMapper, args);
      }
  
      /**
       * Returns the most recently played albums.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param musicFolders Only return albums in these folders.
       * @return The most recently played albums.
       */
      public List<MediaFile> getMostRecentlyPlayedAlbums(final int offset, final int count, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + QUERY_COLUMNS
                            + " from media_file where type = :type and last_played is not null and present " +
                            "and folder in (:folders) order by last_played desc limit :count offset :offset", rowMapper, args);
      }
  
      /**
       * Returns the most recently added albums.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param musicFolders Only return albums in these folders.
       * @return The most recently added albums.
       */
      public List<MediaFile> getNewestAlbums(final int offset, final int count, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
  
          return namedQuery("select " + QUERY_COLUMNS
                            + " from media_file where type = :type and folder in (:folders) and present " +
                            "order by created desc limit :count offset :offset", rowMapper, args);
      }
  
      /**
       * Returns albums in alphabetical order.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param byArtist     Whether to sort by artist name
       * @param musicFolders Only return albums in these folders.
       * @return Albums in alphabetical order.
       */
      public List<MediaFile> getAlphabeticalAlbums(final int offset, final int count, boolean byArtist, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
  
          String orderBy = byArtist ? "artist, album" : "album";
          return namedQuery("select " + QUERY_COLUMNS
                            + " from media_file where type = :type and folder in (:folders) and present " +
                            "order by " + orderBy + " limit :count offset :offset", rowMapper, args);
      }
  
      /**
       * Returns albums within a year range.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param fromYear     The first year in the range.
       * @param toYear       The last year in the range.
       * @param musicFolders Only return albums in these folders.
       * @return Albums in the year range.
       */
      public List<MediaFile> getAlbumsByYear(final int offset, final int count, final int fromYear, final int toYear,
                                             final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("fromYear", fromYear);
          args.put("toYear", toYear);
          args.put("count", count);
          args.put("offset", offset);
  
          if (fromYear <= toYear) {
              return namedQuery("select " + QUERY_COLUMNS
                                + " from media_file where type = :type and folder in (:folders) and present " +
                                "and year between :fromYear and :toYear order by year limit :count offset :offset",
                                rowMapper, args);
          } else {
              return namedQuery("select " + QUERY_COLUMNS
                                + " from media_file where type = :type and folder in (:folders) and present " +
                                "and year between :toYear and :fromYear order by year desc limit :count offset :offset",
                                rowMapper, args);
          }
      }
  
      /**
       * Returns albums in a genre.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param genre        The genre name.
       * @param musicFolders Only return albums in these folders.
       * @return Albums in the genre.
       */
      public List<MediaFile> getAlbumsByGenre(final int offset, final int count, final String genre,
                                              final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("genre", genre);
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + QUERY_COLUMNS + " from media_file where type = :type and folder in (:folders) " +
                            "and present and genre = :genre limit :count offset :offset", rowMapper, args);
      }
  
      public List<MediaFile> getSongsByGenre(final String genre, final int offset, final int count, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("types", Arrays.asList(MediaFile.MediaType.MUSIC.name(), MediaFile.MediaType.PODCAST.name(), MediaFile.MediaType.AUDIOBOOK.name()));
          args.put("genre", genre);
          args.put("count", count);
          args.put("offset", offset);
          args.put("folders", MusicFolder.toPathList(musicFolders));
          return namedQuery("select " + QUERY_COLUMNS + " from media_file where type in (:types) and genre = :genre " +
                            "and present and folder in (:folders) limit :count offset :offset",
                            rowMapper, args);
      }
  
      public List<MediaFile> getSongsByArtist(String artist, int offset, int count) {
          return query("select " + QUERY_COLUMNS
                       + " from media_file where type in (?,?,?) and artist=? and present limit ? offset ?",
                       rowMapper, MediaFile.MediaType.MUSIC.name(), MediaFile.MediaType.PODCAST.name(), MediaFile.MediaType.AUDIOBOOK.name(), artist, count, offset);
      }
  
      public MediaFile getSongByArtistAndTitle(final String artist, final String title, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty() || StringUtils.isBlank(title) || StringUtils.isBlank(artist)) {
              return null;
          }
          Map<String, Object> args = new HashMap<>();
          args.put("artist", artist);
          args.put("title", title);
          args.put("type", MediaFile.MediaType.MUSIC.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          return namedQueryOne("select " + QUERY_COLUMNS + " from media_file where artist = :artist " +
                               "and title = :title and type = :type and present and folder in (:folders)",
                               rowMapper, args);
      }
  
      /**
       * Returns the most recently starred albums.
       *
       * @param offset       Number of albums to skip.
       * @param count        Maximum number of albums to return.
       * @param username     Returns albums starred by this user.
       * @param musicFolders Only return albums in these folders.
       * @return The most recently starred albums for this user.
       */
      public List<MediaFile> getStarredAlbums(final int offset, final int count, final String username,
                                              final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("username", username);
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + prefix(QUERY_COLUMNS, "media_file") + " from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and " +
                            "media_file.present and media_file.type = :type and media_file.folder in (:folders) and starred_media_file.username = :username " +
                            "order by starred_media_file.created desc limit :count offset :offset",
                            rowMapper, args);
      }
  
      /**
       * Returns the most recently starred directories.
       *
       * @param offset       Number of directories to skip.
       * @param count        Maximum number of directories to return.
       * @param username     Returns directories starred by this user.
       * @param musicFolders Only return albums in these folders.
       * @return The most recently starred directories for this user.
       */
      public List<MediaFile> getStarredDirectories(final int offset, final int count, final String username,
                                                   final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.DIRECTORY.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("username", username);
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + prefix(QUERY_COLUMNS, "media_file") + " from starred_media_file, media_file " +
                            "where media_file.id = starred_media_file.media_file_id and " +
                            "media_file.present and media_file.type = :type and starred_media_file.username = :username and " +
                            "media_file.folder in (:folders) " +
                            "order by starred_media_file.created desc limit :count offset :offset",
                            rowMapper, args);
      }
  
      /**
       * Returns the most recently starred files.
       *
       * @param offset       Number of files to skip.
       * @param count        Maximum number of files to return.
       * @param username     Returns files starred by this user.
       * @param musicFolders Only return albums in these folders.
       * @return The most recently starred files for this user.
       */
      public List<MediaFile> getStarredFiles(final int offset, final int count, final String username,
                                             final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return Collections.emptyList();
          }
          Map<String, Object> args = new HashMap<>();
          args.put("types", Arrays.asList(MediaFile.MediaType.MUSIC.name(), MediaFile.MediaType.PODCAST.name(), MediaFile.MediaType.AUDIOBOOK.name(), MediaFile.MediaType.VIDEO.name()));
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("username", username);
          args.put("count", count);
          args.put("offset", offset);
          return namedQuery("select " + prefix(QUERY_COLUMNS, "media_file") + " from starred_media_file, media_file where media_file.id = starred_media_file.media_file_id and " +
                            "media_file.present and media_file.type in (:types) and starred_media_file.username = :username and " +
                            "media_file.folder in (:folders) " +
                            "order by starred_media_file.created desc limit :count offset :offset",
                            rowMapper, args);
      }
  
      public List<MediaFile> getRandomSongs(RandomSearchCriteria criteria, final String username) {
          if (criteria.getMusicFolders().isEmpty()) {
              return Collections.emptyList();
          }
  
          Map<String, Object> args = new HashMap<>();
          args.put("folders", MusicFolder.toPathList(criteria.getMusicFolders()));
          args.put("username", username);
          args.put("fromYear", criteria.getFromYear());
          args.put("toYear", criteria.getToYear());
          args.put("genre", criteria.getGenre());
          args.put("minLastPlayed", criteria.getMinLastPlayedDate());
          args.put("maxLastPlayed", criteria.getMaxLastPlayedDate());
          args.put("minAlbumRating", criteria.getMinAlbumRating());
          args.put("maxAlbumRating", criteria.getMaxAlbumRating());
          args.put("minPlayCount", criteria.getMinPlayCount());
          args.put("maxPlayCount", criteria.getMaxPlayCount());
          args.put("starred", criteria.isShowStarredSongs());
          args.put("unstarred", criteria.isShowUnstarredSongs());
          args.put("format", criteria.getFormat());
  
          boolean joinAlbumRating = (criteria.getMinAlbumRating() != null || criteria.getMaxAlbumRating() != null);
          boolean joinStarred = (criteria.isShowStarredSongs() ^ criteria.isShowUnstarredSongs());
  
          String query = "select " + prefix(QUERY_COLUMNS, "media_file") + " from media_file ";
  
          if (joinStarred) {
              query += "left outer join starred_media_file on media_file.id = starred_media_file.media_file_id and starred_media_file.username = :username ";
          }
  
          if (joinAlbumRating) {
              query += "left outer join media_file media_album on media_album.type = 'ALBUM' and media_album.album = media_file.album and media_album.artist = media_file.artist ";
              query += "left outer join user_rating on user_rating.path = media_album.path and user_rating.username = :username ";
          }
  
          query += " where media_file.present and media_file.type = 'MUSIC'";
  
          if (!criteria.getMusicFolders().isEmpty()) {
              query += " and media_file.folder in (:folders)";
          }
  
          if (criteria.getGenre() != null) {
              query += " and media_file.genre = :genre";
          }
  
          if (criteria.getFormat() != null) {
              query += " and media_file.format = :format";
          }
  
          if (criteria.getFromYear() != null) {
              query += " and media_file.year >= :fromYear";
          }
  
          if (criteria.getToYear() != null) {
              query += " and media_file.year <= :toYear";
          }
  
          if (criteria.getMinLastPlayedDate() != null) {
              query += " and media_file.last_played >= :minLastPlayed";
          }
  
          if (criteria.getMaxLastPlayedDate() != null) {
              if (criteria.getMinLastPlayedDate() == null) {
                  query += " and (media_file.last_played is null or media_file.last_played <= :maxLastPlayed)";
              } else {
                  query += " and media_file.last_played <= :maxLastPlayed";
              }
          }
  
          if (criteria.getMinAlbumRating() != null) {
              query += " and user_rating.rating >= :minAlbumRating";
          }
  
          if (criteria.getMaxAlbumRating() != null) {
              if (criteria.getMinAlbumRating() == null) {
                  query += " and (user_rating.rating is null or user_rating.rating <= :maxAlbumRating)";
              } else {
                  query += " and user_rating.rating <= :maxAlbumRating";
              }
          }
  
          if (criteria.getMinPlayCount() != null) {
              query += " and media_file.play_count >= :minPlayCount";
          }
  
          if (criteria.getMaxPlayCount() != null) {
              if (criteria.getMinPlayCount() == null) {
                  query += " and (media_file.play_count is null or media_file.play_count <= :maxPlayCount)";
              } else {
                  query += " and media_file.play_count <= :maxPlayCount";
              }
          }
  
          if (criteria.isShowStarredSongs() && !criteria.isShowUnstarredSongs()) {
              query += " and starred_media_file.id is not null";
          }
  
          if (criteria.isShowUnstarredSongs() && !criteria.isShowStarredSongs()) {
              query += " and starred_media_file.id is null";
          }
  
          query += " order by rand()";
  
          query += " limit " + criteria.getCount();
  
          return namedQuery(query, rowMapper, args);
      }
  
      /**
       * Return a list of media file objects that don't belong to an existing music folder
       * @param count maximum number of media file objects to return
       * @param excludeFolders music folder paths excluded from the results
       * @return a list of media files, sorted by id
       */
      public List<MediaFile> getFilesInNonPresentMusicFolders(final int count, List<String> excludeFolders) {
          Map<String, Object> args = new HashMap<>();
          args.put("excludeFolders", excludeFolders);
          args.put("count", count);
          return namedQuery(
                  "SELECT " + prefix(QUERY_COLUMNS, "media_file") + " FROM media_file " +
                  "LEFT OUTER JOIN music_folder ON music_folder.path = media_file.folder " +
                  "WHERE music_folder.id IS NULL " +
                  "AND media_file.folder NOT IN (:excludeFolders) " +
                  "ORDER BY media_file.id LIMIT :count",
                  rowMapper, args);
      }
  
      /**
       * Count the number of media files that don't belong to an existing music folder
       * @param excludeFolders music folder paths excluded from the results
       * @return a number of media file rows in the database
       */
      public int getFilesInNonPresentMusicFoldersCount(List<String> excludeFolders) {
          Map<String, Object> args = new HashMap<>();
          args.put("excludeFolders", excludeFolders);
          return namedQueryForInt(
                  "SELECT count(media_file.id) FROM media_file " +
                  "LEFT OUTER JOIN music_folder ON music_folder.path = media_file.folder " +
                  "WHERE music_folder.id IS NULL " +
                  "AND media_file.folder NOT IN (:excludeFolders) ",
                  0, args);
      }
  
      /**
       * Return a list of media file objects whose path don't math their music folder
       * @param count maximum number of media file objects to return
       * @return a list of media files, sorted by id
       */
      public List<MediaFile> getFilesWithMusicFolderMismatch(final int count) {
          return query(
                  "SELECT " + prefix(QUERY_COLUMNS, "media_file") + " FROM media_file " +
                  "WHERE media_file.path != media_file.folder " +
                  "AND media_file.path NOT LIKE concat(media_file.folder, concat(?, '%')) " +
                  "ORDER BY media_file.id LIMIT ?",
                  rowMapper, File.separator, count);
      }
  
      /**
       * Count the number of media files whose path don't math their music folder
       * @return a number of media file rows in the database
       */
      public int getFilesWithMusicFolderMismatchCount() {
          return queryForInt(
                  "SELECT count(media_file.id) FROM media_file " +
                  "WHERE media_file.path != media_file.folder " +
                  "AND media_file.path NOT LIKE concat(media_file.folder, '/%')",
                  0);
      }
  
      public int getAlbumCount(final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return 0;
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          return namedQueryForInt("select count(*) from media_file where type = :type and folder in (:folders) and present", 0, args);
      }
  
      public int getPlayedAlbumCount(final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return 0;
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          return namedQueryForInt("select count(*) from media_file where type = :type " +
                                  "and play_count > 0 and present and folder in (:folders)", 0, args);
      }
  
      public int getStarredAlbumCount(final String username, final List<MusicFolder> musicFolders) {
          if (musicFolders.isEmpty()) {
              return 0;
          }
          Map<String, Object> args = new HashMap<>();
          args.put("type", MediaFile.MediaType.ALBUM.name());
          args.put("folders", MusicFolder.toPathList(musicFolders));
          args.put("username", username);
          return namedQueryForInt("select count(*) from starred_media_file, media_file " +
                                  "where media_file.id = starred_media_file.media_file_id " +
                                  "and media_file.type = :type " +
                                  "and media_file.present " +
                                  "and media_file.folder in (:folders) " +
                                  "and starred_media_file.username = :username",
                                  0, args);
      }
  
      public void starMediaFile(int id, String username) {
          unstarMediaFile(id, username);
          update("insert into starred_media_file(media_file_id, username, created) values (?,?,?)", id, username, new Date());
      }
  
      public void unstarMediaFile(int id, String username) {
          update("delete from starred_media_file where media_file_id=? and username=?", id, username);
      }
  
      public Date getMediaFileStarredDate(int id, String username) {
          return queryForDate("select created from starred_media_file where media_file_id=? and username=?", null, id, username);
      }
  
      public void markPresent(String path, Date lastScanned) {
          update("update media_file set present=?, last_scanned = ? where path=?", true, lastScanned, path);
      }
  
      public void markNonPresent(Date lastScanned) {
          int minId = queryForInt("select min(id) from media_file where last_scanned < ? and present", 0, lastScanned);
          int maxId = queryForInt("select max(id) from media_file where last_scanned < ? and present", 0, lastScanned);
  
          final int batchSize = 1000;
          Date childrenLastUpdated = new Date(0L);  // Used to force a children rescan if file is later resurrected.
          for (int id = minId; id <= maxId; id += batchSize) {
              update("update media_file set present=false, children_last_updated=? where id between ? and ? and " +
                              "last_scanned < ? and present",
                     childrenLastUpdated, id, id + batchSize, lastScanned);
          }
      }
  
      public List<Integer> getArtistExpungeCandidates() {
          return queryForInts("select id from media_file where media_file.type = ? and not present",
                  MediaFile.MediaType.DIRECTORY.name());
      }
  
      public List<Integer> getAlbumExpungeCandidates() {
          return queryForInts("select id from media_file where media_file.type = ? and not present",
                  MediaFile.MediaType.ALBUM.name());
      }
  
      public List<Integer> getSongExpungeCandidates() {
          return queryForInts("select id from media_file where media_file.type in (?,?,?,?) and not present",
                  MediaFile.MediaType.MUSIC.name(), MediaFile.MediaType.PODCAST.name(),
                  MediaFile.MediaType.AUDIOBOOK.name(), MediaFile.MediaType.VIDEO.name());
      }
  
      public void expunge() {
          int minId = queryForInt("select min(id) from media_file where not present", 0);
          int maxId = queryForInt("select max(id) from media_file where not present", 0);
  
          final int batchSize = 1000;
          for (int id = minId; id <= maxId; id += batchSize) {
              update("delete from media_file where id between ? and ? and not present", id, id + batchSize);
          }
      }
  
      private static class MediaFileMapper implements RowMapper<MediaFile> {
          public MediaFile mapRow(ResultSet rs, int rowNum) throws SQLException {
              return new MediaFile(
                      rs.getInt(1),
                      rs.getString(2),
                      rs.getString(3),
                      MediaFile.MediaType.valueOf(rs.getString(4)),
                      rs.getString(5),
                      rs.getString(6),
                      rs.getString(7),
                      rs.getString(8),
                      rs.getString(9),
                      rs.getInt(10) == 0 ? null : rs.getInt(10),
                      rs.getInt(11) == 0 ? null : rs.getInt(11),
                      rs.getInt(12) == 0 ? null : rs.getInt(12),
                      rs.getString(13),
                      rs.getInt(14) == 0 ? null : rs.getInt(14),
                      rs.getBoolean(15),
                      rs.getInt(16) == 0 ? null : rs.getInt(16),
                      rs.getLong(17) == 0 ? null : rs.getLong(17),
                      rs.getInt(18) == 0 ? null : rs.getInt(18),
                      rs.getInt(19) == 0 ? null : rs.getInt(19),
                      rs.getString(20),
                      rs.getString(21),
                      rs.getInt(22),
                      rs.getTimestamp(23),
                      rs.getString(24),
                      rs.getTimestamp(25),
                      rs.getTimestamp(26),
                      rs.getTimestamp(27),
                      rs.getTimestamp(28),
                      rs.getBoolean(29),
                      rs.getInt(30),
                      rs.getString(31),
                      rs.getString(32));
          }
      }
  
      private static class MusicFileInfoMapper implements RowMapper<MediaFile> {
          public MediaFile mapRow(ResultSet rs, int rowNum) throws SQLException {
              MediaFile file = new MediaFile();
              file.setPlayCount(rs.getInt(1));
              file.setLastPlayed(rs.getTimestamp(2));
              file.setComment(rs.getString(3));
              return file;
          }
      }
  
      private static class GenreMapper implements RowMapper<Genre> {
          public Genre mapRow(ResultSet rs, int rowNum) throws SQLException {
              return new Genre(rs.getString(1), rs.getInt(2), rs.getInt(3));
          }
      }
  }
  