--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_muc_batched_probe/README.markdown	Wed Apr 29 13:00:22 2020 +0200
@@ -0,0 +1,49 @@
+# mod_muc_batched_probe
+
+This module allows you to probe the presences of multiple MUC occupants or members.
+
+XEP-0045 makes provision for MUC presence probes, which allows an entity to
+probe for the presence information of a MUC occupant (or offline member).
+
+See here: https://xmpp.org/extensions/xep-0045.html#bizrules-presence
+
+This module creates the possibility to probe with a single IQ stanza the
+presence information of multiple JIDs, instead of having to send out a presence
+probe stanza per JID.
+
+The IQ stanza needs to look as follows:
+
+```
+   <iq from="hag66@shakespeare.lit/pda"
+      id="zb8q41f4"
+      to="chat.shakespeare.lit"
+      type="get">
+
+      <query xmlns="http://jabber.org/protocol/muc#user">
+         <item jid="hecate@shakespeare.lit"/>
+         <item jid="crone1@shakespeare.lit"/>
+         <item jid="wiccarocks@shakespeare.lit"/>
+         <item jid="hag66@shakespeare.lit"/>
+      </query>
+   </iq>
+```
+
+
+
+## Configuration
+
+Under your MUC component, add `muc_batched_probe` to `modules_enabled`
+
+```
+   Component "conference.example.org" "muc"
+      modules_enabled = {
+               "muc_batched_probe";
+      }
+```
+
+
+## Client Support
+
+Converse.js has a plugin which supports this feature.
+
+https://www.npmjs.com/package/@converse-plugins/muc-presence-probe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_muc_batched_probe/mod_muc_batched_probe.lua	Wed Apr 29 13:00:22 2020 +0200
@@ -0,0 +1,35 @@
+-- This module allows you to probe the MUC presences for multiple occupants.
+-- Copyright (C) 2020 JC Brand
+
+local st = require "util.stanza";
+local mod_muc = module:depends"muc";
+local get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or
+	function (jid)
+		local rooms = rawget(mod_muc, "rooms");
+		return rooms[jid];
+	end
+
+module:log("debug", "Module loaded");
+
+
+local function respondToBatchedProbe(event)
+	local stanza = event.stanza;
+	if stanza.attr.type ~= "get" then
+		return;
+	end
+	local query = stanza:get_child("query", "http://jabber.org/protocol/muc#user");
+	if not query then
+		return;
+	end;
+
+	local room = get_room_from_jid(stanza.attr.to);
+	for item in query.get_children() do
+		local probed_jid = item.attr.jid;
+		room:respond_to_probe(stanza.attr.from, probed_jid);
+	end
+	event.origin.send(st.reply(stanza));
+	return true;
+end
+
+
+module:hook("iq/bare", respondToBatchedProbe, 1);