mod_pep: Handle disco#info queries to nodes (fixes #805)

plugins/mod_pep.lua

@@ -294,11 +294,21 @@ module:hook("account-disco-items", function(event)
 
 	if user_data then
 		for node, _ in pairs(user_data) do
-			reply:tag('item', {jid=bare, node=node}):up(); -- TODO we need to handle queries to these nodes
+			reply:tag('item', {jid=bare, node=node}):up();
 		end
 	end
 end);
 
+module:hook("account-disco-info-node", function (event)
+	local session, stanza, node = event.origin, event.stanza, event.node;
+	local user = stanza.attr.to;
+	local user_data = data[user];
+	if user_data and user_data[node] then
+		event.exists = true;
+		event.reply:tag('identity', {category='pubsub', type='leaf'}):up();
+	end
+end);
+
 module:hook("resource-unbind", function (event)
 	local user_bare_jid = event.session.username.."@"..event.session.host;
 	if not bare_sessions[user_bare_jid] then -- User went offline