fix: Fixes notifying vnodes to destroy rooms.

It may happen we receive the disconnect iq after the main room is already destroyed. We now send disconnect on destroy to all vnodes or when receiving disconnect iq per vnode.

resources/prosody-plugins/mod_visitors.lua

@@ -138,6 +138,12 @@ module:hook('iq/host', stanza_handler, 10);
 -- an event received from visitors component, which receives iqs from jicofo
 local function disconnect_vnode(event)
     local room, vnode = event.room, event.vnode;
+
+    if visitors_nodes[event.room.jid] == nil then
+        -- maybe the room was already destroyed and vnodes cleared
+        return;
+    end
+
     local conference_service = muc_domain_prefix..'.'..vnode..'.meet.jitsi';
 
     -- we are counting vnode main participants and we should be clearing it there
@@ -236,7 +242,17 @@ process_host_module(main_muc_component_config, function(host_module, host)
 
     -- cleanup cache
     host_module:hook('muc-room-destroyed',function(event)
-        visitors_nodes[event.room.jid] = nil;
+        local room = event.room;
+
+        -- room is destroyed let's disconnect all vnodes
+        if visitors_nodes[room.jid] then
+            local vnodes = visitors_nodes[room.jid].nodes;
+            for conference_service in pairs(vnodes) do
+                send_visitors_iq(conference_service, room, 'disconnect');
+            end
+
+            visitors_nodes[room.jid] = nil;
+        end
     end);
 
     -- detects new participants joining main room and sending them to the visitor nodes

resources/prosody-plugins/mod_visitors_component.lua

@@ -128,6 +128,7 @@ local function stanza_handler(event)
     local room = get_room_from_jid(room_jid_match_rewrite(room_jid));
 
     if not room then
+        -- this maybe as we receive the iq from jicofo after the room is already destroyed
         module:log('debug', 'No room found %s', room_jid);
         return;
     end