From e8085a9493cfc5036dfa7870b47ad51695d11bab Mon Sep 17 00:00:00 2001
From: Eric Eastwood <eric@Erics-MBP.hsd1.mn.comcast.net>
Date: Wed, 16 Dec 2020 15:10:36 -0600
Subject: [PATCH] MSC2716: Incremental existing history

Fix https://github.com/matrix-org/matrix-doc/blob/matthew/msc2716/proposals/2716-importing-history-into-existing-rooms.md
---
 clientapi/routing/sendevent.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/clientapi/routing/sendevent.go b/clientapi/routing/sendevent.go
index bfb48f3d..3d28f1e2 100644
--- a/clientapi/routing/sendevent.go
+++ b/clientapi/routing/sendevent.go
@@ -52,6 +52,12 @@ func SendEvent(
 	rsAPI api.RoomserverInternalAPI,
 	txnCache *transactions.Cache,
 ) util.JSONResponse {
+	prevEvent := req.URL.Query().Get("prev_event")
+
+	util.GetLogger(req.Context()).WithFields(logrus.Fields{
+		"prevEvent": prevEvent,
+	}).Info("prevEvent")
+
 	verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
 	verRes := api.QueryRoomVersionForRoomResponse{}
 	if err := rsAPI.QueryRoomVersionForRoom(req.Context(), &verReq, &verRes); err != nil {