Do not overwrite existing lyrics

Instead of overwriting the lyrics file, which may have been locally
modified after download, skip processing if the lyrics file is already
present.

```
Skipping 06 Vengeance Venom, lyrics file exists: /opt/docker-data/jellyfin/media/music/Leaves' Eyes/King of Kings (Deluxe Version)/06 Vengeance Venom.lrc
[exact_search] requesting: http://lrclib.net/api/get?track_name=09+Haraldskv%C3%A6di&artist_name=Leaves%27+Eyes&album_name=King+of+Kings+%28Deluxe+Version%29&duration=204
```

README.md

@@ -1,14 +1,13 @@
 ### Lyrics getter
 
-Huge thanks to https://github.com/tranxuanthang/lrclib ofc.
+Huge thanks to <https://github.com/tranxuanthang/lrclib> ofc.
 
 Uses lrclib.net to get lyrics for my Jellyfin library. Does /get, if unavailable tried to do /search
 
 Is very much dependant on having the Jellyfin suggested music library structure. (Artist/Album/Song).
 
 To run go `lyricsrs <music_directory>` or clone the repo and `cargo run <music_directory>`.
 
-Will overwrite any .lrc files you already have with the existing name.
+Will not overwrite any .lrc files you already have with the existing name.
 
 Only does synced lyrics because they are cool.
-

src/main.rs

@@ -147,21 +147,32 @@ fn get_audio_duration(file_path: &PathBuf) -> Duration {
     tagged_file.properties().duration()
 }
 
-async fn save_synced_lyrics(
+fn lyrics_file_name(
     music_dir: &Path,
     artist_dir: &Path,
     album_dir: &Path,
     song_name: &String,
-    synced_lyrics: String,
-    successful_count: Arc<AtomicUsize>,
-) {
+) -> String {
     let mut parent_dir = PathBuf::new();
     parent_dir.push(music_dir);
     parent_dir.push(artist_dir);
     parent_dir.push(album_dir);
 
     let file_path = format!("{}/{}.lrc", parent_dir.to_string_lossy(), song_name);
 
+    return file_path;
+}
+
+async fn save_synced_lyrics(
+    music_dir: &Path,
+    artist_dir: &Path,
+    album_dir: &Path,
+    song_name: &String,
+    synced_lyrics: String,
+    successful_count: Arc<AtomicUsize>,
+) {
+    let file_path = lyrics_file_name(music_dir, artist_dir, album_dir, song_name);
+
     // Create a new file or overwrite existing one
     let mut file = File::create(&file_path)
         .await
@@ -204,6 +215,14 @@ async fn exact_search(
         .expect("invalid file_path")
         .to_string_lossy()
         .into_owned();
+
+    // Skip if the lyrics file already exists
+    let lyrics_path = lyrics_file_name(music_dir, artist_dir, album_dir, &song_name);
+    if Path::new(&lyrics_path).exists() {
+        println!("Skipping {}, lyrics file exists: {}", song_name, lyrics_path);
+        return;
+    }
+
     let clean_song = remove_numbered_prefix(&song_name);
 
     let mut full_path = PathBuf::from("");
@@ -311,6 +330,14 @@ async fn fuzzy_search(
         .expect("invalid file_path")
         .to_string_lossy()
         .into_owned();
+
+    // Skip if the lyrics file already exists
+    let lyrics_path = lyrics_file_name(music_dir, artist_dir, album_dir, &song_name);
+    if Path::new(&lyrics_path).exists() {
+        println!("Skipping {}, lyrics file exists: {}", song_name, lyrics_path);
+        return;
+    }
+
     let clean_song = remove_numbered_prefix(&song_name);
     let mut url = "http://lrclib.net/api/search?q=".to_string();