project upload

app/src/main/java/com/cappielloantonio/play/viewmodel/SongViewModel.java

@@ -0,0 +1,40 @@
+package com.cappielloantonio.play.viewmodel;
+
+import android.app.Application;
+
+import androidx.annotation.NonNull;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+
+import com.cappielloantonio.play.model.Song;
+import com.cappielloantonio.play.repository.SongRepository;
+
+import java.util.List;
+
+public class SongViewModel extends AndroidViewModel {
+    private SongRepository repository;
+    private LiveData<List<Song>> allSongs;
+
+    public SongViewModel(@NonNull Application application) {
+        super(application);
+
+        repository = new SongRepository(application);
+        allSongs = repository.getListLiveSongs();
+    }
+
+    public boolean exist(Song song) {
+        return repository.exist(song);
+    }
+
+    public void insert(Song song) {
+        repository.insert(song);
+    }
+
+    public void delete(Song song) {
+        repository.delete(song);
+    }
+
+    public LiveData<List<Song>> getAllSongs() {
+        return allSongs;
+    }
+}