preventing empty sticky messages

cmd_sticky.go

@@ -61,6 +61,12 @@ func inputStickyMessage(i *discordgo.InteractionCreate) {
 	} else {
 		messageText = i.ApplicationCommandData().Options[0].StringValue()
 	}
+	if messageText == "" {
+		err := respond(i.Interaction, "Can't add empty sticky messages!", true)
+		if err != nil {
+			logrus.Error(err)
+		}
+	} else {
 		message, err := bot.ChannelMessageSendEmbed(i.ChannelID, &discordgo.MessageEmbed{
 			Type: discordgo.EmbedTypeArticle,
 			Footer: &discordgo.MessageEmbedFooter{
@@ -91,4 +97,5 @@ func inputStickyMessage(i *discordgo.InteractionCreate) {
 				logrus.Error(err)
 			}
 		}
+	}
 }