# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1531354726 -7200
# Node ID 4028eb4a9f7f5ed38cb9f7d17e8b4b467e650bff
# Parent  91b5a56670168e91f6f7fea66d623eac23a0c0e2
MUC: Also prevent changing to an invisible nickname

diff -r 91b5a5667016 -r 4028eb4a9f7f plugins/muc/muc.lib.lua
--- a/plugins/muc/muc.lib.lua	Thu Jul 12 02:31:47 2018 +0200
+++ b/plugins/muc/muc.lib.lua	Thu Jul 12 02:18:46 2018 +0200
@@ -409,6 +409,13 @@
 	end
 end, 1);
 
+module:hook("muc-occupant-pre-change", function(event)
+	if not jid_resource(event.dest_occupant.nick):find("%S") then
+		event.origin.send(st.error_reply(event.stanza, "modify", "not-allowed", "Invisible Nicknames are forbidden"));
+		return true;
+	end
+end, 1);
+
 function room_mt:handle_first_presence(origin, stanza)
 	if not stanza:get_child("x", "http://jabber.org/protocol/muc") then
 		module:log("debug", "Room creation without <x>, possibly desynced");