From 9f24531220f48720555bea63cdd0d00c25c3e7e6 Mon Sep 17 00:00:00 2001
From: jonas747 <jonasr747@gmail.com>
Date: Thu, 13 Oct 2016 21:42:05 +0200
Subject: [PATCH] Update ChannelMessageAck because of api changes (#270)

---
 restapi.go | 10 ++++++++--
 structs.go |  5 +++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/restapi.go b/restapi.go
index 3214556..2e2adf2 100644
--- a/restapi.go
+++ b/restapi.go
@@ -1127,9 +1127,15 @@ func (s *Session) ChannelMessage(channelID, messageID string) (st *Message, err
 // ChannelMessageAck acknowledges and marks the given message as read
 // channeld  : The ID of a Channel
 // messageID : the ID of a Message
-func (s *Session) ChannelMessageAck(channelID, messageID string) (err error) {
+// lastToken : token returned by last ack
+func (s *Session) ChannelMessageAck(channelID, messageID, lastToken string) (st *Ack, err error) {
 
-	_, err = s.request("POST", EndpointChannelMessageAck(channelID, messageID), "", nil, 0)
+	body, err := s.Request("POST", EndpointChannelMessageAck(channelID, messageID), &Ack{Token: lastToken})
+	if err != nil {
+		return
+	}
+
+	err = unmarshal(body, &st)
 	return
 }
 
diff --git a/structs.go b/structs.go
index 88352d9..3e0c375 100644
--- a/structs.go
+++ b/structs.go
@@ -408,6 +408,11 @@ type MessageAck struct {
 	ChannelID string `json:"channel_id"`
 }
 
+// An Ack is used to ack messages
+type Ack struct {
+	Token string `json:"token"`
+}
+
 // A GuildIntegrationsUpdate stores data for the guild integrations update
 // websocket event.
 type GuildIntegrationsUpdate struct {