From f184824b8c4412b4450df468dd80b6047ab52f5b Mon Sep 17 00:00:00 2001
From: Yannis Matezki <yannis.matezki@web.de>
Date: Tue, 27 Dec 2022 19:23:54 +0100
Subject: [PATCH] Provide previous Member state for GuildMemberUpdate events
 (#1304)

---
 events.go | 1 +
 state.go  | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/events.go b/events.go
index 890df22..6608ab6 100644
--- a/events.go
+++ b/events.go
@@ -150,6 +150,7 @@ type GuildMemberAdd struct {
 // GuildMemberUpdate is the data for a GuildMemberUpdate event.
 type GuildMemberUpdate struct {
 	*Member
+	BeforeUpdate *Member `json:"-"`
 }
 
 // GuildMemberRemove is the data for a GuildMemberRemove event.
diff --git a/state.go b/state.go
index f7bd6b7..38c92d0 100644
--- a/state.go
+++ b/state.go
@@ -983,6 +983,13 @@ func (s *State) OnInterface(se *Session, i interface{}) (err error) {
 		}
 	case *GuildMemberUpdate:
 		if s.TrackMembers {
+			var old *Member
+			old, err = s.Member(t.GuildID, t.User.ID)
+			if err == nil {
+				oldCopy := *old
+				t.BeforeUpdate = &oldCopy
+			}
+
 			err = s.MemberAdd(t.Member)
 		}
 	case *GuildMemberRemove: