Play internet radios in MediaElement (fix #408)

This allows the user to control playback for the internet radios, which
were previously started outside of the main player without any
possibility for direct control.

airsonic-main/src/main/java/org/airsonic/player/ajax/PlayQueueInfo.java

@@ -33,17 +33,19 @@ public class PlayQueueInfo {
     private final List<Entry> entries;
     private final boolean stopEnabled;
     private final boolean repeatEnabled;
-    private final boolean radioEnabled;
+    private final boolean shuffleRadioEnabled;
+    private final boolean internetRadioEnabled;
     private final boolean sendM3U;
     private final float gain;
     private int startPlayerAt = -1;
     private long startPlayerAtPosition; // millis
 
-    public PlayQueueInfo(List<Entry> entries, boolean stopEnabled, boolean repeatEnabled, boolean radioEnabled, boolean sendM3U, float gain) {
+    public PlayQueueInfo(List<Entry> entries, boolean stopEnabled, boolean repeatEnabled, boolean shuffleRadioEnabled, boolean internetRadioEnabled, boolean sendM3U, float gain) {
         this.entries = entries;
         this.stopEnabled = stopEnabled;
         this.repeatEnabled = repeatEnabled;
-        this.radioEnabled = radioEnabled;
+        this.shuffleRadioEnabled = shuffleRadioEnabled;
+        this.internetRadioEnabled = internetRadioEnabled;
         this.sendM3U = sendM3U;
         this.gain = gain;
     }
@@ -74,8 +76,12 @@ public class PlayQueueInfo {
         return repeatEnabled;
     }
 
-    public boolean isRadioEnabled() {
-        return radioEnabled;
+    public boolean isShuffleRadioEnabled() {
+        return shuffleRadioEnabled;
+    }
+
+    public boolean isInternetRadioEnabled() {
+        return internetRadioEnabled;
     }
 
     public float getGain() {
@@ -121,9 +127,27 @@ public class PlayQueueInfo {
         private final String coverArtUrl;
         private final String remoteCoverArtUrl;
 
-        public Entry(int id, Integer trackNumber, String title, String artist, String album, String genre, Integer year,
-                String bitRate, Integer duration, String durationAsString, String format, String contentType, String fileSize,
-                boolean starred, String albumUrl, String streamUrl, String remoteStreamUrl, String coverArtUrl, String remoteCoverArtUrl) {
+        public Entry(
+                int id,
+                Integer trackNumber,
+                String title,
+                String artist,
+                String album,
+                String genre,
+                Integer year,
+                String bitRate,
+                Integer duration,
+                String durationAsString,
+                String format,
+                String contentType,
+                String fileSize,
+                boolean starred,
+                String albumUrl,
+                String streamUrl,
+                String remoteStreamUrl,
+                String coverArtUrl,
+                String remoteCoverArtUrl) {
+
             this.id = id;
             this.trackNumber = trackNumber;
             this.title = title;
@@ -220,5 +244,6 @@ public class PlayQueueInfo {
         public String getRemoteCoverArtUrl() {
             return remoteCoverArtUrl;
         }
+
     }
 }

airsonic-main/src/main/java/org/airsonic/player/ajax/PlayQueueService.java

@@ -19,8 +19,11 @@
  */
 package org.airsonic.player.ajax;
 
+import chameleon.playlist.*;
+import chameleon.playlist.Playlist;
 import com.google.common.base.Function;
 import com.google.common.collect.Lists;
+import org.airsonic.player.dao.InternetRadioDao;
 import org.airsonic.player.dao.MediaFileDao;
 import org.airsonic.player.dao.PlayQueueDao;
 import org.airsonic.player.domain.*;
@@ -28,6 +31,8 @@ import org.airsonic.player.service.*;
 import org.airsonic.player.service.PlaylistService;
 import org.airsonic.player.util.StringUtil;
 import org.directwebremoting.WebContextFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.web.servlet.support.RequestContextUtils;
@@ -35,6 +40,7 @@ import org.springframework.web.servlet.support.RequestContextUtils;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import java.net.URL;
 import java.util.*;
 
 /**
@@ -74,8 +80,12 @@ public class PlayQueueService {
     @Autowired
     private PlayQueueDao playQueueDao;
     @Autowired
+    private InternetRadioDao internetRadioDao;
+    @Autowired
     private JWTSecurityService jwtSecurityService;
 
+    private static final Logger LOG = LoggerFactory.getLogger(PlayQueueService.class);
+
     /**
      * Returns the play queue for the player of the current user.
      *
@@ -143,6 +153,7 @@ public class PlayQueueService {
         String username = securityService.getCurrentUsername(request);
         Player player = getCurrentPlayer(request, response);
         PlayQueue playQueue = player.getPlayQueue();
+        playQueue.setInternetRadio(null);
         if (playQueue.getRandomSearchCriteria() != null) {
             playQueue.addFiles(true, mediaFileService.getRandomSongs(playQueue.getRandomSearchCriteria(), username));
         }
@@ -232,6 +243,19 @@ public class PlayQueueService {
         return doPlay(request, player, songs).setStartPlayerAt(0);
     }
 
+    /**
+     * @param index Start playing at this index, or play whole radio playlist if {@code null}.
+     */
+    public PlayQueueInfo playInternetRadio(int id, Integer index) throws Exception {
+        HttpServletRequest request = WebContextFactory.get().getHttpServletRequest();
+
+        InternetRadio radio = internetRadioDao.getInternetRadioById(id);
+        if (!radio.isEnabled()) { throw new Exception("Radio is not enabled"); }
+
+        Player player = resolvePlayer();
+        return doPlayInternetRadio(request, player, radio).setStartPlayerAt(0);
+    }
+
     /**
      * @param index Start playing at this index, or play whole playlist if {@code null}.
      */
@@ -418,6 +442,17 @@ public class PlayQueueService {
         }
         player.getPlayQueue().addFiles(false, files);
         player.getPlayQueue().setRandomSearchCriteria(null);
+        player.getPlayQueue().setInternetRadio(null);
+        if (player.isJukebox()) {
+            jukeboxService.play(player);
+        }
+        return convert(request, player, true);
+    }
+
+    private PlayQueueInfo doPlayInternetRadio(HttpServletRequest request, Player player, InternetRadio radio) throws Exception {
+        player.getPlayQueue().clear();
+        player.getPlayQueue().setRandomSearchCriteria(null);
+        player.getPlayQueue().setInternetRadio(radio);
         if (player.isJukebox()) {
             jukeboxService.play(player);
         }
@@ -433,6 +468,7 @@ public class PlayQueueService {
         Player player = getCurrentPlayer(request, response);
         player.getPlayQueue().addFiles(false, randomFiles);
         player.getPlayQueue().setRandomSearchCriteria(null);
+        player.getPlayQueue().setInternetRadio(null);
         return convert(request, player, true).setStartPlayerAt(0);
     }
 
@@ -445,6 +481,8 @@ public class PlayQueueService {
         List<MediaFile> similarSongs = lastFmService.getSimilarSongs(artist, count, musicFolders);
         Player player = getCurrentPlayer(request, response);
         player.getPlayQueue().addFiles(false, similarSongs);
+        player.getPlayQueue().setRandomSearchCriteria(null);
+        player.getPlayQueue().setInternetRadio(null);
         return convert(request, player, true).setStartPlayerAt(0);
     }
 
@@ -478,6 +516,7 @@ public class PlayQueueService {
             playQueue.addFiles(true, files);
         }
         playQueue.setRandomSearchCriteria(null);
+        playQueue.setInternetRadio(null);
         return playQueue;
     }
 
@@ -589,7 +628,7 @@ public class PlayQueueService {
         HttpServletResponse response = WebContextFactory.get().getHttpServletResponse();
         Player player = getCurrentPlayer(request, response);
         PlayQueue playQueue = player.getPlayQueue();
-        if (playQueue.isRadioEnabled()) {
+        if (playQueue.isShuffleRadioEnabled()) {
             playQueue.setRandomSearchCriteria(null);
             playQueue.setRepeatEnabled(false);
         } else {
@@ -636,20 +675,43 @@ public class PlayQueueService {
     }
 
     private PlayQueueInfo convert(HttpServletRequest request, Player player, boolean serverSidePlaylist, int offset) throws Exception {
+
         String url = NetworkService.getBaseUrl(request);
+        Locale locale = RequestContextUtils.getLocale(request);
+        PlayQueue playQueue = player.getPlayQueue();
 
-        /* if (serverSidePlaylist && player.isJukebox()) {
-            updateJukebox(player, offset);
-        } */
-        boolean isCurrentPlayer = player.getIpAddress() != null && player.getIpAddress().equals(request.getRemoteAddr());
+        List<PlayQueueInfo.Entry> entries;
+        if (playQueue.isInternetRadioEnabled()) {
+            entries = convertInternetRadio(request, player);
+        } else {
+            entries = convertMediaFileList(request, player);
+        }
 
+        boolean isCurrentPlayer = player.getIpAddress() != null && player.getIpAddress().equals(request.getRemoteAddr());
+        boolean isStopEnabled = playQueue.getStatus() == PlayQueue.Status.PLAYING && !player.isExternalWithPlaylist();
         boolean m3uSupported = player.isExternal() || player.isExternalWithPlaylist();
         serverSidePlaylist = player.isAutoControlEnabled() && m3uSupported && isCurrentPlayer && serverSidePlaylist;
-        Locale locale = RequestContextUtils.getLocale(request);
 
-        List<PlayQueueInfo.Entry> entries = new ArrayList<PlayQueueInfo.Entry>();
+        float gain = jukeboxService.getGain(player);
+
+        return new PlayQueueInfo(
+            entries,
+            isStopEnabled,
+            playQueue.isRepeatEnabled(),
+            playQueue.isShuffleRadioEnabled(),
+            playQueue.isInternetRadioEnabled(),
+            serverSidePlaylist,
+            gain
+        );
+    }
+
+    private List<PlayQueueInfo.Entry> convertMediaFileList(HttpServletRequest request, Player player) {
+
+        String url = NetworkService.getBaseUrl(request);
+        Locale locale = RequestContextUtils.getLocale(request);
         PlayQueue playQueue = player.getPlayQueue();
 
+        List<PlayQueueInfo.Entry> entries = new ArrayList<PlayQueueInfo.Entry>();
         for (MediaFile file : playQueue.getFiles()) {
 
             String albumUrl = url + "main.view?id=" + file.getId();
@@ -668,12 +730,114 @@ public class PlayQueueService {
                     formatFileSize(file.getFileSize(), locale), starred, albumUrl, streamUrl, remoteStreamUrl,
                     coverArtUrl, remoteCoverArtUrl));
         }
-        boolean isStopEnabled = playQueue.getStatus() == PlayQueue.Status.PLAYING && !player.isExternalWithPlaylist();
 
-        float gain = 0.0f;
-        gain = jukeboxService.getGain(player);
+        return entries;
+    }
+
+    private List<PlayQueueInfo.Entry> convertInternetRadio(HttpServletRequest request, Player player) throws Exception {
+
+        // Retrieve radio playlist and parse it
+        PlayQueue playQueue = player.getPlayQueue();
+        InternetRadio radio = playQueue.getInternetRadio();
+        URL playlistUrl = new URL(radio.getStreamUrl());
+        SpecificPlaylist inputPlaylist = null;
+        try {
+            LOG.info("Parsing playlist at {}...", playlistUrl.toString());
+            inputPlaylist = SpecificPlaylistFactory.getInstance().readFrom(playlistUrl);
+        } catch (Exception e) {
+            LOG.error("Unable to parse playlist: {}", playlistUrl.toString(), e);
+            throw e;
+        }
+        if (inputPlaylist == null) {
+            LOG.error("Unsupported playlist format: {}", playlistUrl.toString());
+            throw new Exception("Unsupported playlist format " + playlistUrl.toString());
+        }
+
+        // Retrieve stream URLs
+        List<PlayQueueInfo.Entry> entries = new ArrayList<>();
+        final String radioHomepageUrl = radio.getHomepageUrl();
+        final String radioName = radio.getName();
+        inputPlaylist.toPlaylist().acceptDown(new PlaylistVisitor() {
+            @Override
+            public void beginVisitPlaylist(Playlist playlist) throws Exception {
+
+            }
+
+            @Override
+            public void endVisitPlaylist(Playlist playlist) throws Exception {
+
+            }
+
+            @Override
+            public void beginVisitParallel(Parallel parallel) throws Exception {
+
+            }
+
+            @Override
+            public void endVisitParallel(Parallel parallel) throws Exception {
+
+            }
+
+            @Override
+            public void beginVisitSequence(Sequence sequence) throws Exception {
+
+            }
+
+            @Override
+            public void endVisitSequence(Sequence sequence) throws Exception {
 
-        return new PlayQueueInfo(entries, isStopEnabled, playQueue.isRepeatEnabled(), playQueue.isRadioEnabled(), serverSidePlaylist, gain);
+            }
+
+            @Override
+            public void beginVisitMedia(Media media) throws Exception {
+
+                // Retrieve stream URL
+                String streamUrl = media.getSource().getURI().toString();
+                // Fake stream title using the URL
+                String streamTitle = streamUrl;
+                String streamAlbum = radioName;
+                String streamGenre = "Internet Radio";
+                // Fake entry id so that the source can be selected
+                Integer streamId = -(1+entries.size());
+                Integer streamTrackNumber = entries.size();
+                Integer streamYear = 0;
+
+                LOG.info("Got source media at {}...", streamUrl);
+
+                entries.add(new PlayQueueInfo.Entry(
+                        streamId,          // Entry id
+                        streamTrackNumber, // Track number
+                        streamTitle,       // Use URL as stream title
+                        "",
+                        streamAlbum,       // Album name
+                        streamGenre,
+                        streamYear,
+                        "",
+                        0,
+                        "",
+                        "",
+                        "",
+                        "",
+                        false,
+                        radioHomepageUrl,  // Album URL
+                        streamUrl,         // Stream URL
+                        streamUrl,         // Remote stream URL
+                        null,
+                        null
+                ));
+            }
+
+            @Override
+            public void endVisitMedia(Media media) throws Exception {
+
+            }
+        });
+
+        if (entries.isEmpty()) {
+            LOG.error("Cannot fetch stream URLs from radio source {}", playlistUrl.toString());
+        }
+
+        return entries;
     }
 
     private String formatFileSize(Long fileSize, Locale locale) {
@@ -797,4 +961,8 @@ public class PlayQueueService {
     public void setJwtSecurityService(JWTSecurityService jwtSecurityService) {
         this.jwtSecurityService = jwtSecurityService;
     }
+
+    public void setInternetRadioDao(InternetRadioDao internetRadioDao) {
+        this.internetRadioDao = internetRadioDao;
+    }
 }

airsonic-main/src/main/java/org/airsonic/player/controller/RandomPlayQueueController.java

@@ -239,6 +239,7 @@ public class RandomPlayQueueController {
 
         if (autoRandom != null) {
             playQueue.setRandomSearchCriteria(criteria);
+            playQueue.setInternetRadio(null);
         }
 
         // Render the 'reload' view to reload the play queue and the main page

airsonic-main/src/main/java/org/airsonic/player/dao/InternetRadioDao.java

@@ -42,6 +42,17 @@ public class InternetRadioDao extends AbstractDao {
     private static final String QUERY_COLUMNS = "id, " + INSERT_COLUMNS;
     private final InternetRadioRowMapper rowMapper = new InternetRadioRowMapper();
 
+    /**
+     * Returns the internet radio station with the given ID.
+     *
+     * @param id The unique internet radio station ID.
+     * @return The internet radio station with the given ID, or <code>null</code> if no such internet radio exists.
+     */
+    public InternetRadio getInternetRadioById(int id) {
+        String sql = "select " + QUERY_COLUMNS + " from internet_radio where id=?";
+        return queryOne(sql, rowMapper, id);
+    }
+
     /**
      * Returns all internet radio stations.
      *

airsonic-main/src/main/java/org/airsonic/player/domain/PlayQueue.java

@@ -35,7 +35,9 @@ public class PlayQueue {
     private boolean repeatEnabled;
     private String name = "(unnamed)";
     private Status status = Status.PLAYING;
+
     private RandomSearchCriteria randomSearchCriteria;
+    private InternetRadio internetRadio;
 
     /**
      * The index of the current song, or -1 is the end of the playlist is reached.
@@ -363,13 +365,18 @@ public class PlayQueue {
     }
 
     /**
-     * Returns whether the playlist is a shuffle radio
+     * Returns whether the play queue is in shuffle radio mode.
      *
-     * @return Whether the playlist is a shuffle radio.
+     * @return Whether the play queue is a shuffle radio mode.
      */
-    public synchronized boolean isRadioEnabled() {
-        return this.randomSearchCriteria != null;
-    }
+    public synchronized boolean isShuffleRadioEnabled() { return this.randomSearchCriteria != null; }
+
+    /**
+     * Returns whether the play queue is a internet radio mode.
+     *
+     * @return Whether the play queue is a internet radio mode.
+     */
+    public synchronized boolean isInternetRadioEnabled() { return this.internetRadio != null; }
 
     /**
      * Revert the last operation.
@@ -407,22 +414,32 @@ public class PlayQueue {
     }
 
     /**
-     * Returns the criteria used to generate this random playlist.
+     * Sets the current internet radio
+     *
+     * @param internetRadio An internet radio, or <code>null</code> if this is not an internet radio playlist
+     */
+    public void setInternetRadio(InternetRadio internetRadio) { this.internetRadio = internetRadio; }
+
+    /**
+     * Gets the current internet radio
+     *
+     * @return The current internet radio, or <code>null</code> if this is not an internet radio playlist
+     */
+    public InternetRadio getInternetRadio() { return internetRadio; }
+
+    /**
+     * Returns the criteria used to generate this random playlist
      *
      * @return The search criteria, or <code>null</code> if this is not a random playlist.
      */
-    public synchronized RandomSearchCriteria getRandomSearchCriteria() {
-        return randomSearchCriteria;
-    }
+    public synchronized RandomSearchCriteria getRandomSearchCriteria() { return randomSearchCriteria; }
 
     /**
-     * Sets the criteria used to generate this random playlist.
+     * Sets the criteria used to generate this random playlist
      *
      * @param randomSearchCriteria The search criteria, or <code>null</code> if this is not a random playlist.
      */
-    public synchronized void setRandomSearchCriteria(RandomSearchCriteria randomSearchCriteria) {
-        this.randomSearchCriteria = randomSearchCriteria;
-    }
+    public synchronized void setRandomSearchCriteria(RandomSearchCriteria randomSearchCriteria) { this.randomSearchCriteria = randomSearchCriteria; }
 
     /**
      * Returns the total length in bytes.

airsonic-main/src/main/webapp/WEB-INF/jsp/left.jsp

@@ -20,6 +20,10 @@
                     top.main.location.href = mainLocation;
                 }
             }
+
+            $('.radio-play').on('click', function() {
+               top.playQueue.onPlayInternetRadio($(this).data("id"), 0);
+            });
         }
 
         function updatePlaylists() {
@@ -118,9 +122,10 @@
 
 <c:if test="${not empty model.radios}">
     <h2 class="bgcolor1" style="padding-left: 2px"><fmt:message key="left.radio"/></h2>
+    <iframe id="radio-playlist-data" style="display:none;"></iframe>
     <c:forEach items="${model.radios}" var="radio">
         <p class="dense" style="padding-left: 2px">
-            <a target="hidden" href="${radio.streamUrl}">
+        <a target="hidden" href="${radio.streamUrl}" class="radio-play" data-id="${radio.id}">
             <img src="<spring:theme code="playImage"/>" alt="<fmt:message key="common.play"/>" title="<fmt:message key="common.play"/>"></a>
             <span style="vertical-align: middle">
                 <c:choose>
@@ -128,7 +133,7 @@
                         ${fn:escapeXml(radio.name)}
                     </c:when>
                     <c:otherwise>
-                    <a target="main" href="${radio.homepageUrl}">${fn:escapeXml(radio.name)}</a>
+                        <a target="_blank" rel="noopener" href="${radio.homepageUrl}">${fn:escapeXml(radio.name)}</a>
                     </c:otherwise>
                 </c:choose>
             </span>

airsonic-main/src/main/webapp/WEB-INF/jsp/playQueue.jsp

@@ -31,13 +31,30 @@
 <span id="dummy-animation-target" style="max-width: ${model.autoHide ? 50 : 150}px; display: none"></span>
 
 <script type="text/javascript" language="javascript">
+
+    // These variables store the media player state, received from DWR in the
+    // playQueueCallback function below.
+
+    // List of songs (of type PlayQueueInfo.Entry)
     var songs = null;
+
+    // Stream URL of the media being played
     var currentStreamUrl = null;
+
+    // Is autorepeat enabled?
     var repeatEnabled = false;
-    var radioEnabled = false;
+
+    // Is the "shuffle radio" playing? (More > Shuffle Radio)
+    var shuffleRadioEnabled = false;
+
+    // Is the "internet radio" playing?
+    var internetRadioEnabled = false;
+
+    // Is the play queue visible? (Initially hidden if set to "auto-hide" in the settings)
     var isVisible = ${model.autoHide ? 'false' : 'true'};
+
+    // Initialize the Cast player (ChromeCast support)
     var CastPlayer = new CastPlayer();
-    var ignore = false;
 
     function init() {
         <c:if test="${model.autoHide}">initAutoHide();</c:if>
@@ -267,7 +284,7 @@
     }
     function onNext(wrap) {
         var index = parseInt(getCurrentSongIndex()) + 1;
-        if (radioEnabled && index >= songs.length) {
+        if (shuffleRadioEnabled && index >= songs.length) {
             playQueueService.reloadSearchCriteria(function(playQueue) {
                 playQueueCallback(playQueue);
                 onSkip(index);
@@ -290,6 +307,9 @@
     function onPlayPlaylist(id, index) {
         playQueueService.playPlaylist(id, index, playQueueCallback);
     }
+    function onPlayInternetRadio(id, index) {
+        playQueueService.playInternetRadio(id, index, playQueueCallback);
+    }
     function onPlayTopSong(id, index) {
         playQueueService.playTopSong(id, index, playQueueCallback);
     }
@@ -410,14 +430,16 @@
     function playQueueCallback(playQueue) {
         songs = playQueue.entries;
         repeatEnabled = playQueue.repeatEnabled;
-        radioEnabled = playQueue.radioEnabled;
+        shuffleRadioEnabled = playQueue.shuffleRadioEnabled;
+        internetRadioEnabled = playQueue.internetRadioEnabled;
+
         if ($("#start")) {
             $("#start").toggle(!playQueue.stopEnabled);
             $("#stop").toggle(playQueue.stopEnabled);
         }
 
         if ($("#toggleRepeat")) {
-            if (radioEnabled) {
+            if (shuffleRadioEnabled) {
                 $("#toggleRepeat").html("<fmt:message key="playlist.repeat_radio"/>");
             } else if (repeatEnabled) {
                 $("#toggleRepeat").attr('src', '<spring:theme code="repeatOn"/>');
@@ -449,11 +471,24 @@
             if ($("#trackNumber" + id)) {
                 $("#trackNumber" + id).text(song.trackNumber);
             }
+
+            if (!internetRadioEnabled) {
+                // Show star/remove buttons in all cases...
+                $("#starSong" + id).show();
+                $("#removeSong" + id).show();
+
+                // Show star rating
                 if (song.starred) {
                     $("#starSong" + id).attr("src", "<spring:theme code='ratingOnImage'/>");
                 } else {
                     $("#starSong" + id).attr("src", "<spring:theme code='ratingOffImage'/>");
                 }
+            } else {
+                // ...except from when internet radio is playing.
+                $("#starSong" + id).hide();
+                $("#removeSong" + id).hide();
+            }
+
             if ($("#currentImage" + id) && song.streamUrl == currentStreamUrl) {
                 $("#currentImage" + id).show();
                 if (isJavaJukeboxPresent()) {
@@ -473,6 +508,13 @@
                 $("#album" + id).text(song.album);
                 $("#album" + id).attr("title", song.album);
                 $("#albumUrl" + id).attr("href", song.albumUrl);
+                // Open external internet radio links in new windows
+                if (internetRadioEnabled) {
+                    $("#albumUrl" + id).attr({
+                        target: "_blank",
+                        rel: "noopener noreferrer",
+                    });
+                }
             }
             if ($("#artist" + id)) {
                 $("#artist" + id).text(song.artist);
@@ -482,7 +524,13 @@
                 $("#genre" + id).text(song.genre);
             }
             if ($("#year" + id)) {
+                // If song.year is not an int, this will return NaN, which
+                // conveniently returns false in all boolean operations.
+                if (parseInt(song.year) > 0) {
                     $("#year" + id).text(song.year);
+                } else {
+                    $("#year" + id).text("");
+                }
             }
             if ($("#bitRate" + id)) {
                 $("#bitRate" + id).text(song.bitRate);