Fix cover and artist bug

src/main/java/sbu/javafx/MusicController.java

@@ -13,8 +13,15 @@ import javafx.scene.media.MediaPlayer;
 import javafx.scene.layout.VBox;
 import javafx.stage.FileChooser;
 import javafx.util.Duration;
+import org.jaudiotagger.audio.AudioFile;
+import org.jaudiotagger.audio.AudioFileIO;
+import org.jaudiotagger.audio.AudioHeader;
+import org.jaudiotagger.tag.FieldKey;
+import org.jaudiotagger.tag.Tag;
+import org.jaudiotagger.tag.images.Artwork;
 
 import java.io.File;
+import java.io.FileOutputStream;
 import java.util.*;
 
 public class MusicController {
@@ -177,6 +184,61 @@ public class MusicController {
         return String.format("%d:%02d", minute, second);
     }
 
+    private Song createSongFromFile(File file){
+        String filePath = file.getAbsolutePath();
+        String title = file.getName();
+        String artist = "Unknown";
+        String album = "Unknown";
+        String coverPath = "";
+        int duration = 0;
+
+        try{
+            AudioFile audioFile = AudioFileIO.read(file);
+            Tag tag = audioFile.getTag();
+            AudioHeader header = audioFile.getAudioHeader();
+
+            if(tag != null){
+                // title
+                String t = tag.getFirst(FieldKey.TITLE);
+                if(t != null && !t.isBlank())
+                    title = t;
+
+                // artist
+                String a = tag.getFirst(FieldKey.ARTIST);
+                if(a != null && !a.isBlank())
+                    artist = a;
+
+                // album
+                String al = tag.getFirst(FieldKey.ALBUM);
+                if(al != null && !al.isBlank())
+                    album = al;
+
+                // cover
+                List<Artwork> artworks = tag.getArtworkList();
+                if(artworks != null && !artworks.isEmpty()){
+                    byte[] imageData = artworks.get(0).getBinaryData();
+                    File coverFile = new File(
+                      System.getProperty("java.io.tmpdir"),
+                      title.replaceAll("\\s+", "_") + "_cover.jpg"
+                    );
+
+                    try(FileOutputStream fos = new FileOutputStream(coverFile)){
+                        fos.write(imageData);
+                        coverPath = coverFile.getAbsolutePath();
+                    }
+                }
+            }
+
+            if(header != null)
+                duration = header.getTrackLength();
+
+        } catch(Exception e){
+            System.out.println("Cannot read metadata, " + e.getMessage());
+        }
+
+        return new Song(title, artist, album, filePath, coverPath, duration);
+    }
+
     //  ========================================= Control buttons ============================================
     @FXML
     public void handlePlayPause() {
@@ -238,8 +300,7 @@ public class MusicController {
         List<File> files = fileChooser.showOpenMultipleDialog(null);
         if(files == null) return;
         for(File file : files){
-            String name = file.getName();
-            Song song = new Song(name, "Unknown", "Unknown", file.getAbsolutePath(), "", 0);
+            Song song = createSongFromFile(file);
             library.add(song);
         }
         libraryCount.setText(library.size() + " Songs");