add debug to trace activity

src/plugins/converse-rai.js

@@ -88,7 +88,7 @@ converse.plugins.add('converse-rai', {
     },
   },
   initialize() {
-    const { Strophe, _, $pres, u, sizzle } = converse.env;
+    const { Strophe, _, $pres, u, sizzle, log } = converse.env;
     const _converse = this._converse;
     const { api } = _converse;
 
@@ -141,6 +141,7 @@ converse.plugins.add('converse-rai', {
       if (rai) {
         rai.querySelectorAll('activity').forEach(activity => {
           const jid = activity.textContent;
+          log.debug(`Received activity for the room: ${jid}`);
           api.trigger('chatRoomHasActivity', jid);
         });
       }