Added function to save song to the filesystem

src/song.rs

@@ -1,4 +1,4 @@
-use std::io::Read;
+use std::io::{Read,Write};
 
 use crate::constants;
 use crate::init;
@@ -150,4 +150,27 @@ impl Song {
 
         filename
     }
+
+    pub fn save_to_filesystem(&self) -> Result<(), std::io::Error> {
+        match self.song_path() {
+            Ok(song_path) => {
+                match std::fs::File::create(&song_path) {
+                    Ok(mut file) => {
+                        match file.write_all(&self.data) {
+                            Ok(_res) => {
+                                Ok(())
+                            }
+                            Err(err) => {
+                                Err(err)
+                            }
+                        }
+                    }
+                    Err(err) => {
+                        Err(err)
+                    }
+                }
+            }
+            Err(err) => Err(err)
+        }
+    }
 }