From 3b5ffe23430a857a44087078b1b3f00929871225 Mon Sep 17 00:00:00 2001
From: Maria Tyschitskaya <tyschitskaya@retailcrm.ru>
Date: Tue, 2 Nov 2021 15:11:36 +0300
Subject: [PATCH] add postback payload description in message

---
 message.go   | 11 +++++++++--
 receiving.go | 22 +++++++++++-----------
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/message.go b/message.go
index 233ffa2..f2564ba 100644
--- a/message.go
+++ b/message.go
@@ -130,12 +130,19 @@ type PostBack struct {
 	Recipient Recipient `json:"-"`
 	// Time is when the message was sent.
 	Time time.Time `json:"-"`
-	// PostBack ID
-	Payload string `json:"payload"`
+	// PostBack Payload
+	Payload PostBackPayload `json:"payload"`
 	// Optional referral info
 	Referral Referral `json:"referral"`
 }
 
+// PostBackPayload represents payload data in PostBack
+type PostBackPayload struct {
+	Title   string `json:"title"`
+	Payload string `json:"payload"`
+	Mid     string `json:"mid"`
+}
+
 type AccountLinking struct {
 	// Sender is who the message was sent from.
 	Sender Sender `json:"-"`
diff --git a/receiving.go b/receiving.go
index f08a46f..2c6a05f 100644
--- a/receiving.go
+++ b/receiving.go
@@ -117,20 +117,20 @@ type Payload struct {
 	URL   string `json:"url,omitempty"`
 	Title string `json:"title,omitempty"`
 	// Coordinates is Lat/Long pair of location pin
-	Coordinates *Coordinates `json:"coordinates,omitempty"`
-	TemplateType string `json:"template_type,omitempty"`
-	Buttons []Button `json:"buttons,omitempty"`
+	Coordinates  *Coordinates `json:"coordinates,omitempty"`
+	TemplateType string       `json:"template_type,omitempty"`
+	Buttons      []Button     `json:"buttons,omitempty"`
 }
 
 type Button struct {
-	Type string `json:"type,omitempty"`
-	Title string `json:"title,omitempty"`
-	Payload string `json:"payload,omitempty"`
-	URL string `json:"url,omitempty"`
-	WebviewHeightRatio string `json:"webview_height_ratio,omitempty"`
-	MessengerExtensions bool `json:"messenger_extensions,omitempty"`
-	FallbackURL string `json:"fallback_url,omitempty"`
-	WebviewShareButton string `json:"webview_share_button,omitempty"`
+	Type                string `json:"type,omitempty"`
+	Title               string `json:"title,omitempty"`
+	Payload             string `json:"payload,omitempty"`
+	URL                 string `json:"url,omitempty"`
+	WebviewHeightRatio  string `json:"webview_height_ratio,omitempty"`
+	MessengerExtensions bool   `json:"messenger_extensions,omitempty"`
+	FallbackURL         string `json:"fallback_url,omitempty"`
+	WebviewShareButton  string `json:"webview_share_button,omitempty"`
 }
 
 // Coordinates is a pair of latitude and longitude.