fix(visitors): Let people join lobby when main room is empty but with lobby.

Author: damencho

resources/prosody-plugins/mod_muc_lobby_rooms.lua

@@ -243,7 +243,7 @@ function attach_lobby_room(room, actor)
 end
 
 -- destroys lobby room for the supplied main room
-function destroy_lobby_room(room, newjid, message, skip_metadata_event)
+function destroy_lobby_room(room, newjid, message, send_metadata_event)
     if not message then
         message = 'Lobby room closed.';
     end
@@ -261,7 +261,7 @@ function destroy_lobby_room(room, newjid, message, skip_metadata_event)
 
         if room.jitsiMetadata then
             room.jitsiMetadata.lobbyEnabled = false;
-            if not skip_metadata_event then
+            if send_metadata_event then
                 module:context(main_muc_component_config):fire_event('room-metadata-changed', { room = room; });
             end
         end
@@ -505,7 +505,7 @@ process_host_module(main_muc_component_config, function(host_module, host)
                 room_metadata_changed = true;
             end
         elseif room._data.lobbyroom then
-            destroy_lobby_room(room, room.jid, nil, room_metadata_changed);
+            destroy_lobby_room(room, room.jid, nil, not room_metadata_changed);
             module:fire_event('jitsi-lobby-disabled', { room = room; });
             notify_lobby_enabled(room, actor, false);
         end

resources/prosody-plugins/mod_visitors_component.lua

@@ -565,6 +565,10 @@ process_host_module(muc_domain_prefix..'.'..muc_domain_base, function(host_modul
         elseif room._data.participants then
                 -- This is non jaas room which has a list of participants allowed to participate in the main room
                 -- but this occupant is not one of them and the room is either not live or has no participants joined
+                if room:get_members_only() then
+                    -- if there is a lobby, let's pass it through it will wait for the main participant
+                    return;
+                end
                 session.log('warn',
                     'Deny user join in the main not live meeting, not in the list of main participants');
                 session.send(st.error_reply(