Sending audio

api.go

@@ -230,3 +230,42 @@ func api_sendPhoto(token string, recipient User, photo *Photo) error {
 
 	return nil
 }
+
+func api_sendAudio(token string, recipient User, audio *Audio) error {
+	params := url.Values{}
+	params.Set("chat_id", strconv.Itoa(recipient.Id))
+
+	var response_json []byte
+	var err error
+
+	if audio.Exists() {
+		params.Set("audio", audio.FileId)
+		response_json, err = api_GET("sendAudio", token, params)
+	} else {
+		response_json, err = api_POST("sendAudio", token, "audio",
+			audio.filename, params)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	var response_recieved struct {
+		Ok          bool
+		Result      Message
+		Description string
+	}
+
+	err = json.Unmarshal(response_json, &response_recieved)
+	if err != nil {
+		return err
+	}
+
+	if !response_recieved.Ok {
+		return SendError{response_recieved.Description}
+	}
+
+	*audio = response_recieved.Result.Audio
+
+	return nil
+}

bot.go

@@ -49,6 +49,21 @@ func (b *Bot) ForwardMessage(recipient User, message Message) error {
 }
 
 // SendPhoto sends a photo object to recipient.
+//
+// On success, photo object would be aliased to its copy on
+// the Telegram servers, so sending the same photo object
+// again, won't issue a new upload, but would make a use
+// of existing file on Telegram servers.
 func (b *Bot) SendPhoto(recipient User, photo *Photo) error {
 	return api_sendPhoto(b.Token, recipient, photo)
 }
+
+// SendPhoto sends an audio object to recipient.
+//
+// On success, audio object would be aliased to its copy on
+// the Telegram servers, so sending the same audio object
+// again, won't issue a new upload, but would make a use
+// of existing file on Telegram servers.
+func (b *Bot) SendAudio(recipient User, audio *Audio) error {
+	return api_sendAudio(b.Token, recipient, audio)
+}