Player can now auto repeat a single song.

src/main/java/musicplayer/player/GStreamerPlayer.java

@@ -24,6 +24,7 @@ public class GStreamerPlayer implements IPlayer{
     private final PlayerCallbackInterface callbackInterface;
     private int currentVolume = 100;
     private final IPlaylist playlist;
+    private boolean repeatMode = false; // Repeat the current song?
 
     /**
      * Manages GStreamer based playback operations.
@@ -47,7 +48,10 @@ public class GStreamerPlayer implements IPlayer{
             Thread callbackThing = new Thread(() -> {
                 try {
                     Thread.sleep(1000); // Song is about to finish, wait so we don't cut it off early.
-                    playSong(playlist.getNext(currentSong));
+                    if(repeatMode)
+                        playSong(currentSong);
+                    else
+                        playSong(playlist.getNext(currentSong));
                 } catch (InterruptedException | StartPlayingException e) {
                     e.printStackTrace();
                 }
@@ -81,44 +85,48 @@ public class GStreamerPlayer implements IPlayer{
         playSong(playlist.getActive());
     }
 
+    private void playSong(Song inputSong) throws StartPlayingException {
+        if (playBin.getState() == State.PLAYING)
+            stop();
+        if(playBin.getState() == State.PAUSED && inputSong == currentSong) {
+            resume();
+            return;
+        }
+        resetSeek();
+        playBin.setState(State.READY);
+        currentSong = inputSong;
+        playlist.setPlayingSong(currentSong);
+        File songFile = currentSong.getSongFile();
+        if (!songFile.exists()) {
+            playlist.delete(currentSong);
+            next();
+            return;
+        }
+        playBin.setURI(songFile.toURI());
+        internalThread = new InternalThread();
+        thread = new Thread(internalThread, "GSTThread");
+        setVolume(currentVolume);
+        playBin.play();
+        if(playBin.getState() == State.PLAYING) {
+            thread.start();
+            while (true) {
+                if (playBin.queryDuration().getSeconds() > 0 || playBin.queryDuration().getNanoSeconds() > 0) break;
+            } // Wait for song to actually be playing otherwise queryDuration is always zero
+            if(callbackInterface != null)
+                callbackInterface.setSeekBarDuration((int) playBin.queryDuration().toSeconds());
+        }
+        else{
+            throw new StartPlayingException(inputSong);
+        }
+    }
+
     /**
      * Set a source Song file and start playing it via GStreamer.
      * @param inputSong Song to play.
      */
     public void playSong(Optional<Song> inputSong) throws StartPlayingException {
-        if (playBin.getState() == State.PLAYING)
-            stop();
         if(inputSong.isPresent()) {
-            if(playBin.getState() == State.PAUSED && inputSong.get() == currentSong) {
+            playSong(inputSong.get());
-                resume();
-                return;
-            }
-            resetSeek();
-            playBin.setState(State.READY);
-            currentSong = inputSong.get();
-            playlist.setPlayingSong(currentSong);
-            File songFile = currentSong.getSongFile();
-            if (!songFile.exists()) {
-                playlist.delete(currentSong);
-                next();
-                return;
-            }
-            playBin.setURI(songFile.toURI());
-            internalThread = new InternalThread();
-            thread = new Thread(internalThread, "GSTThread");
-            setVolume(currentVolume);
-            playBin.play();
-            if(playBin.getState() == State.PLAYING) {
-                thread.start();
-                while (true) {
-                    if (playBin.queryDuration().getSeconds() > 0 || playBin.queryDuration().getNanoSeconds() > 0) break;
-                } // Wait for song to actually be playing otherwise queryDuration is always zero
-                if(callbackInterface != null)
-                    callbackInterface.setSeekBarDuration((int) playBin.queryDuration().toSeconds());
-            }
-            else{
-                throw new StartPlayingException(inputSong.get());
-            }
         }
     }
 
@@ -211,4 +219,8 @@ public class GStreamerPlayer implements IPlayer{
     public boolean isPlaying(){
         return playBin.isPlaying();
     }
+
+    public void setRepeat(boolean repeatMode) { this.repeatMode = repeatMode; }
+
+    public boolean isRepeating(){ return repeatMode; }
 }

src/main/java/musicplayer/player/IPlayer.java

@@ -19,4 +19,6 @@ public interface IPlayer {
     int getVolume();
     void seek(int position);
     boolean isPlaying();
+    void setRepeat(boolean repeatMode);
+    boolean isRepeating();
 }