From 08bfc48abf8c138b540ede6c816338c044130dec Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Tue, 22 May 2018 17:27:03 +0100
Subject: [PATCH] custom error code for not leaving server notices room

---
 synapse/api/errors.py           | 1 +
 synapse/handlers/room_member.py | 1 +
 2 files changed, 2 insertions(+)

diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index aca804280c..e6ad3768f0 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -53,6 +53,7 @@ class Codes(object):
     INVALID_USERNAME = "M_INVALID_USERNAME"
     SERVER_NOT_TRUSTED = "M_SERVER_NOT_TRUSTED"
     CONSENT_NOT_GIVEN = "M_CONSENT_NOT_GIVEN"
+    CANNOT_LEAVE_SERVER_NOTICE_ROOM = "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM"
 
 
 class CodeMessageException(RuntimeError):
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index 5263f09aaa..82adfc8fdf 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -306,6 +306,7 @@ class RoomMemberHandler(object):
                 raise SynapseError(
                     http_client.FORBIDDEN,
                     "You cannot leave this room",
+                    errcode=Codes.CANNOT_LEAVE_SERVER_NOTICE_ROOM,
                 )
 
         if effective_membership_state == Membership.INVITE: