From 4a6d74ef80cb33b3624aab9c4a6329e72430d57e Mon Sep 17 00:00:00 2001
From: Kevin Cali <20154415+kevincali@users.noreply.github.com>
Date: Sun, 7 Jul 2024 21:13:33 +0200
Subject: [PATCH] feat(ChannelUpdate): add BeforeUpdate (#1539)

---
 events.go | 1 +
 state.go  | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/events.go b/events.go
index c2a9d20d0..e19290ec0 100644
--- a/events.go
+++ b/events.go
@@ -53,6 +53,7 @@ type ChannelCreate struct {
 // ChannelUpdate is the data for a ChannelUpdate event.
 type ChannelUpdate struct {
 	*Channel
+	BeforeUpdate *Channel `json:"-"`
 }
 
 // ChannelDelete is the data for a ChannelDelete event.
diff --git a/state.go b/state.go
index d0c7b4222..bac4bf3f3 100644
--- a/state.go
+++ b/state.go
@@ -1056,6 +1056,11 @@ func (s *State) OnInterface(se *Session, i interface{}) (err error) {
 		}
 	case *ChannelUpdate:
 		if s.TrackChannels {
+			old, err := s.Channel(t.ID)
+			if err == nil {
+				oldCopy := *old
+				t.BeforeUpdate = &oldCopy
+			}
 			err = s.ChannelAdd(t.Channel)
 		}
 	case *ChannelDelete: