From e9cc522c78c8f3f02e3aed4e6347d4f2ba06981d Mon Sep 17 00:00:00 2001
From: Vinh Quang Tran <starcraft6723@hotmail.com>
Date: Thu, 6 Feb 2025 00:12:29 +0700
Subject: [PATCH] fix: prevent panic when songs do not contain any artists

---
 main.go | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/main.go b/main.go
index 45807e3..3508b18 100644
--- a/main.go
+++ b/main.go
@@ -883,11 +883,13 @@ func writeMP4Tags(trackPath string, meta *structs.AutoGenerated, trackNum, track
 	}
 
 	if len(meta.Data[0].Relationships.Artists.Data) > 0 {
-		artistID, err := strconv.ParseUint(meta.Data[0].Relationships.Tracks.Data[index].Relationships.Artists.Data[0].ID, 10, 32)
-		if err != nil {
-			return err
+		if len(meta.Data[0].Relationships.Tracks.Data[index].Relationships.Artists.Data) > 0 {
+			artistID, err := strconv.ParseUint(meta.Data[0].Relationships.Tracks.Data[index].Relationships.Artists.Data[0].ID, 10, 32)
+			if err != nil {
+				return err
+			}
+			t.ItunesArtistID = int32(artistID)
 		}
-		t.ItunesArtistID = int32(artistID)
 	}
 
 	if strings.Contains(meta.Data[0].ID, "pl.") && !Config.UseSongInfoForPlaylist {