Sender actions support

actions.go

@@ -24,3 +24,20 @@ const (
 	// status.
 	AccountLinkingAction
 )
+
+// SenderAction is used to send a specific action (event) to the Facebook.
+// The result of sending said action is supposed to give more interactivity to the bot.
+type SenderAction string
+
+const (
+	// MarkSeen marks message as seen.
+	MarkSeen SenderAction = "MARK_SEEN"
+	// TypingOn turns on "Bot is typing..." indicator.
+	TypingOn SenderAction = "TYPING_ON"
+	// TypingOff turns off typing indicator.
+	TypingOff SenderAction = "TYPING_OFF"
+	// React to the message.
+	React SenderAction = "REACT"
+	// Unreact to the message (remove reaction).
+	Unreact SenderAction = "UNREACT"
+)

messenger.go

@@ -508,6 +508,15 @@ func (m *Messenger) EnableChatExtension(homeURL HomeURL) error {
 	return checkFacebookError(resp.Body)
 }
 
+func (m *Messenger) SenderAction(to Recipient, action SenderAction) (QueryResponse, error) {
+	response := &Response{
+		token:          m.token,
+		to:             to,
+		sendAPIVersion: m.sendAPIVersion,
+	}
+	return response.SenderAction(action)
+}
+
 // classify determines what type of message a webhook event is.
 func (m *Messenger) classify(info MessageInfo) Action {
 	if info.Message != nil {

response.go

@@ -352,8 +352,8 @@ func (r *Response) ListTemplate(elements *[]StructuredMessageElement, messagingT
 	return r.DispatchMessage(&m)
 }
 
-// SenderAction sends a info about sender action.
+// SenderAction sends an info about sender action.
-func (r *Response) SenderAction(action string) (QueryResponse, error) {
+func (r *Response) SenderAction(action SenderAction) (QueryResponse, error) {
 	m := SendSenderAction{
 		Recipient:    r.to,
 		SenderAction: action,
@@ -548,5 +548,5 @@ type StructuredMessageButton struct {
 // SendSenderAction is the information about sender action.
 type SendSenderAction struct {
 	Recipient    Recipient    `json:"recipient"`
-	SenderAction string    `json:"sender_action"`
+	SenderAction SenderAction `json:"sender_action"`
 }