fix Various Artists dont have artist cover

main.go

@@ -1405,9 +1405,11 @@ func rip(albumId string, token string, storefront string, userToken string) erro
 	fmt.Println(albumFolder)
 	//get artist cover
 	if config.SaveArtistCover && !(strings.Contains(albumId, "pl.")) {
-		err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
-		if err != nil {
-			fmt.Println("Failed to write artist cover.")
+		if len(meta.Data[0].Relationships.Artists.Data) > 0 {
+			err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
+			if err != nil {
+				fmt.Println("Failed to write artist cover.")
+			}
 		}
 	}
 	//get album cover

main_atmos.go

@@ -45,7 +45,7 @@ type Config struct {
 	EmbyAnimatedArtwork     bool   `yaml:"emby-animated-artwork"`
 	EmbedLrc                bool   `yaml:"embed-lrc"`
 	EmbedCover              bool   `yaml:"embed-cover"`
-	SaveArtistCover		bool   `yaml:"save-artist-cover"`
+	SaveArtistCover         bool   `yaml:"save-artist-cover"`
 	CoverSize               string `yaml:"cover-size"`
 	CoverFormat             string `yaml:"cover-format"`
 	AlacSaveFolder          string `yaml:"alac-save-folder"`
@@ -1321,9 +1321,11 @@ func rip(albumId string, token string, storefront string, userToken string) erro
 	fmt.Println(albumFolder)
 	//get artist cover
 	if config.SaveArtistCover && !(strings.Contains(albumId, "pl.")) {
-		err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
-		if err != nil {
-			fmt.Println("Failed to write artist cover.")
+		if len(meta.Data[0].Relationships.Artists.Data) > 0 {
+			err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
+			if err != nil {
+				fmt.Println("Failed to write artist cover.")
+			}
 		}
 	}
 	//get album cover
@@ -2182,7 +2184,7 @@ type AutoGenerated struct {
 				ID   string `json:"id"`
 				Kind string `json:"kind"`
 			} `json:"playParams"`
-			IsCompilation bool `json:"isCompilation"`
+			IsCompilation  bool `json:"isCompilation"`
 			EditorialVideo struct {
 				MotionDetailSquare struct {
 					Video string `json:"video"`
@@ -2204,7 +2206,7 @@ type AutoGenerated struct {
 					Type       string `json:"type"`
 					Href       string `json:"href"`
 					Attributes struct {
-						Name string `json:"name"`
+						Name    string `json:"name"`
 						Artwork struct {
 							Url string `json:"url"`
 						} `json:"artwork"`

main_select.go

@@ -1281,9 +1281,11 @@ func rip(albumId string, token string, storefront string, userToken string) erro
 	fmt.Println(albumFolder)
 	//get artist cover
 	if config.SaveArtistCover && !(strings.Contains(albumId, "pl.")) {
-		err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
-		if err != nil {
-			fmt.Println("Failed to write artist cover.")
+		if len(meta.Data[0].Relationships.Artists.Data) > 0 {
+			err = writeCover(singerFolder, "folder", meta.Data[0].Relationships.Artists.Data[0].Attributes.Artwork.Url)
+			if err != nil {
+				fmt.Println("Failed to write artist cover.")
+			}
 		}
 	}
 	//get album cover