cache the refreshed tokens

cmd/spotifyPlaylists.go

@@ -41,16 +41,30 @@ var spotifyPlaylistsCmd = &cobra.Command{
 Take note of the desired playlist ID and add it to your config file.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		var (
-			token = new(oauth2.Token)
-			auth  = spotifyauth.New()
-			ctx   = context.Background()
+			cachedToken = new(oauth2.Token)
+			auth        = spotifyauth.New(
+				spotifyauth.WithClientID(viper.GetString("spotify_client_id")),
+				spotifyauth.WithClientSecret(viper.GetString("spotify_client_secret")),
+				spotifyauth.WithScopes(spotifyauth.ScopePlaylistModifyPublic),
+			)
+			ctx = context.Background()
 		)
 		// Spotify client initialization
-		token.AccessToken = viper.GetString("spotify_access_token")
-		token.RefreshToken = viper.GetString("spotify_refresh_token")
-		token.TokenType = viper.GetString("spotify_token_type")
-		token.Expiry = viper.GetTime("spotify_token_expiry")
-		client := spotify.New(auth.Client(ctx, token))
+		cachedToken.AccessToken = viper.GetString("spotify_access_token")
+		cachedToken.RefreshToken = viper.GetString("spotify_refresh_token")
+		cachedToken.TokenType = viper.GetString("spotify_token_type")
+		cachedToken.Expiry = viper.GetTime("spotify_token_expiry")
+		client := spotify.New(auth.Client(ctx, cachedToken))
+		newToken, err := client.Token()
+		cobra.CheckErr(err)
+		if newToken != cachedToken {
+			viper.Set("spotify_access_token", newToken.AccessToken)
+			viper.Set("spotify_refresh_token", newToken.RefreshToken)
+			viper.Set("spotify_token_type", newToken.TokenType)
+			viper.Set("spotify_token_expiry", newToken.Expiry)
+			err = viper.WriteConfig()
+			cobra.CheckErr(err)
+		}
 
 		results, err := client.CurrentUsersPlaylists(ctx, spotify.Limit(50))
 		if err != nil {