feat: add fallback for album and album artist

src/main.rs

@@ -1,5 +1,6 @@
 use clap::{Parser, Subcommand};
 use lofty::file::TaggedFileExt;
+use lofty::prelude::ItemKey;
 use lofty::probe::Probe;
 use lofty::tag::Accessor;
 use lofty::tag::Tag;
@@ -35,9 +36,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             for item in tag.items() {
                 println!("{:?}", item)
             }
-
-            let album_artist = tag.get_string(lofty::tag::ItemKey::AlbumArtist);
-            println!("AlbumArtist: {:?}", album_artist);
         }
     }
 
@@ -63,34 +61,27 @@ fn move_files(file_path: PathBuf, tag: Tag) -> Result<(), Box<dyn std::error::Er
     let artist = tag.artist();
     let album = tag.album();
     let title = tag.title();
+    let album_artist_path = tag.get_string(ItemKey::AlbumArtist).unwrap_or("None");
 
-    let mut target = PathBuf::new();
+    let artist_dir = if !album_artist_path.is_empty() {
+        Some(album_artist_path)
+    } else {
+        artist.as_deref()
+    };
 
-    if let (Some(artist_path), Some(album_path), Some(title_path)) = (artist, album, title) {
-        if album_path.is_empty() {
-            let dir_to_create = target_dir
-                .join(artist_path.as_ref())
-                .join(title_path.as_ref());
+    let album_dir = album.or(title);
 
-            let _ = create_dir_all(dir_to_create);
+    let (Some(artist_dir), Some(album_dir)) = (artist_dir, album_dir) else {
+        return Ok(());
+    };
 
-            target = target_dir
-                .join(artist_path.as_ref())
-                .join(title_path.as_ref())
-                .join(&file_path);
-        } else {
-            let dir_to_create = target_dir
-                .join(artist_path.as_ref())
-                .join(album_path.as_ref());
+    let dir_to_create = target_dir.join(artist_dir).join(album_dir.as_ref());
+    let _ = create_dir_all(dir_to_create);
+    let target = target_dir
+        .join(artist_dir)
+        .join(album_dir.as_ref())
+        .join(&file_path);
 
-            let _ = create_dir_all(dir_to_create);
-
-            target = target_dir
-                .join(artist_path.as_ref())
-                .join(album_path.as_ref())
-                .join(&file_path);
-        }
-    }
     println!("{:?}", target);
     //rename(file_path, target)?;
     copy(file_path, target)?;