Add attachment support to text messages

cmd/bot/main.go

@@ -32,6 +32,7 @@ func main() {
 	m.HandleMessage(func(m messenger.Message, r *messenger.Response) {
 		fmt.Printf("%v (Sent, %v)\n", m.Text, m.Time.Format(time.UnixDate))
 		fmt.Println(r.Text("Hello, World!"))
+		fmt.Println(m.Attachments)
 	})
 
 	m.HandleDelivery(func(d messenger.Delivery, r *messenger.Response) {

message.go

@@ -9,6 +9,7 @@ type Message struct {
 	Mid         string       `json:"mid"`
 	Text        string       `json:"text"`
 	Seq         int          `json:"seq"`
+	Attachments []Attachment `json:"attachments"`
 }
 
 type Delivery struct {

receiving.go

@@ -26,3 +26,12 @@ type Sender struct {
 type Recipient struct {
 	ID int64 `json:"id"`
 }
+
+type Attachment struct {
+	Type    string  `json:"type"`
+	Payload Payload `json:"payload"`
+}
+
+type Payload struct {
+	URL string `json:"url"`
+}