handling empty command, fixing #3

cmd/telegramBot.go

@@ -101,8 +101,22 @@ It is not planned to extend this in the future.`,
 						err = viper.WriteConfig()
 						cobra.CheckErr(err)
 					}
-					results, err := client.Search(ctx, strings.TrimPrefix(update.Message.Text, "/spotigram "), spotify.SearchTypeTrack)
+
-					cobra.CheckErr(err)
+					var results *spotify.SearchResult
+
+					if strings.HasPrefix(update.Message.Text, "/spotigram ") {
+						results, err = client.Search(ctx, strings.TrimPrefix(update.Message.Text, "/spotigram "), spotify.SearchTypeTrack)
+						cobra.CheckErr(err)
+					}
+
+					if !strings.HasPrefix(update.Message.Text, "/spotigram ") {
+						msg.Text = "⛔ Ooops, du musst einen Titel angeben!\n <code>/spotigram [Titel]</code>"
+						msg.ParseMode = "HTML"
+						_, err = bot.Send(msg)
+						cobra.CheckErr(err)
+
+						fmt.Printf("Command used incorrectly.")
+					}
 
 					if results != nil {
 
@@ -145,7 +159,8 @@ It is not planned to extend this in the future.`,
 								track.Name,
 								track.Artists[0].Name)
 
-						} else {
+						}
+						if !contains(trackIDs, results.Tracks.Tracks[0].ID) {
 							track := results.Tracks.Tracks[0]
 
 							addTrackResponse, err := client.AddTracksToPlaylist(ctx,