From d989b6d6e447dc11318c00114456252819e01cc3 Mon Sep 17 00:00:00 2001
From: yflory <yann.flory@xwiki.com>
Date: Wed, 30 Jan 2019 15:49:07 +0100
Subject: [PATCH] Fix one case of phantom viewers

---
 www/common/outer/onlyoffice.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/www/common/outer/onlyoffice.js b/www/common/outer/onlyoffice.js
index c08135b20..daaf307fd 100644
--- a/www/common/outer/onlyoffice.js
+++ b/www/common/outer/onlyoffice.js
@@ -205,12 +205,14 @@ define([
             }
         }
 
-        var oldChannel = ctx.clients[clientId].channel;
-        var oldChan = ctx.channels[oldChannel];
-        if (oldChan) {
-            ctx.emit('LEAVE', {id: clientId}, [oldChan.clients[0]]);
+        if (ctx.clients[clientId]) {
+            var oldChannel = ctx.clients[clientId].channel;
+            var oldChan = ctx.channels[oldChannel];
+            if (oldChan) {
+                ctx.emit('LEAVE', {id: clientId}, [oldChan.clients[0]]);
+            }
+            delete ctx.clients[clientId];
         }
-        delete ctx.clients[clientId];
     };