bot: add callback unique field

bot.go

@@ -383,6 +383,7 @@ func (b *Bot) ProcessUpdate(upd Update) {
 					unique, payload := match[0][1], match[0][3]
 
 					if handler, ok := b.handlers["\f"+unique]; ok {
+						c.callback.Unique = unique
 						c.callback.Data = payload
 						b.runHandler(handler, c)
 						return

callbacks.go

@@ -27,6 +27,11 @@ type Callback struct {
 	// Data associated with the callback button. Be aware that
 	// a bad client can send arbitrary data in this field.
 	Data string `json:"data"`
+
+	// Unique displays an unique of the button from which the
+	// callback was fired. Sets immediately before the handling,
+	// while the Data field stores only with payload.
+	Unique string `json:"-"`
 }
 
 // IsInline says whether message is an inline message.

middleware/logger.go

@@ -22,7 +22,9 @@ func Logger(logger *logrus.Logger, fieldsFunc ...LoggerFieldsFunc) tele.Middlewa
 	return func(next tele.HandlerFunc) tele.HandlerFunc {
 		return func(c tele.Context) error {
 			data := c.Data()
-			if data == "" {
+			if clb := c.Callback(); clb != nil {
+				data = clb.Unique + "|" + data
+			} else if data == "" {
 				data = c.Text()
 			}