Calling the /sponge command as a reply will now spongify the quoted message

commands/sponge.go

@@ -15,15 +15,24 @@ import (
 	tb "gopkg.in/tucnak/telebot.v2"
 )
 
-func Sponge(m *tb.Message) {
-	message := ""
-	for i, char := range shared.History.LastMessage(m.Chat.ID) {
+func Spongify(input_message string) string {
+    spongified_message := ""
+	for i, char := range input_message {
 		if i%2 == 0 {
-			message += strings.ToLower(string(char))
+			spongified_message += strings.ToLower(string(char))
 		} else {
-			message += strings.ToUpper(string(char))
+			spongified_message += strings.ToUpper(string(char))
 		}
 	}
-	shared.Bot.Send(m.Chat, message)
-
+    return spongified_message
+}
+
+func Sponge(m *tb.Message) {
+	message := ""
+    if m.IsReply() {
+        message = Spongify(m.ReplyTo.Text)
+    } else {
+        message = Spongify(shared.History.LastMessage(m.Chat.ID))
+    }
+    shared.Bot.Send(m.Chat, message)
 }