--- a/mod_nodeinfo2/mod_nodeinfo2.lua	Mon Dec 30 22:20:11 2019 +0100
+++ b/mod_nodeinfo2/mod_nodeinfo2.lua	Mon Dec 30 22:39:17 2019 +0100
@@ -1,6 +1,8 @@
 local json = require "util.json";
 local array = require "util.array";
+local add_task = require "util.timer".add_task;
 local get_stats = require "core.statsmanager".get_stats;
+local list_users = require "core.usermanager".users;
 local os_time = os.time;
 
 module:depends("http");
@@ -14,39 +16,45 @@
 local main_store = module:open_store();
 local lastlog_store = module:open_store("lastlog");
 
-local total_users = 0;
-local half_year_users = 0;
-local month_users = 0;
-local week_users = 0;
-for user in require "core.usermanager".users(module.host) do -- TODO refresh at some interval?
-	total_users = total_users + 1;
-	local lastlog = lastlog_store:get(user);
-	if lastlog and lastlog.timestamp then
-		local delta = os_time() - lastlog.timestamp;
-		if delta < 6 * 30 * 24 * 60 * 60 then
-			half_year_users = half_year_users + 1;
-		end
-		if delta < 30 * 24 * 60 * 60 then
-			month_users = month_users + 1;
-		end
-		if delta < 7 * 24 * 60 * 60 then
-			week_users = week_users + 1;
-		end
-	end
-end
-
--- Remove the properties if we couldn’t find a single active user.  It most likely means mod_lastlog isn’t in use.
-if half_year_users == 0 and month_users == 0 and week_users == 0 then
-	half_year_users = nil;
-	month_users = nil;
-	week_users = nil;
-end
-
 local data;
 if expose_posts then
 	data = main_store:get("nodeinfo2") or { message_count = 0 };
 end
 
+local total_users = 0;
+local week_users = 0;
+local month_users = 0;
+local half_year_users = 0;
+
+local function update_user_list()
+	for user in list_users(module.host) do
+		total_users = total_users + 1;
+		local lastlog = lastlog_store:get(user);
+		if lastlog and lastlog.timestamp then
+			local delta = os_time() - lastlog.timestamp;
+			if delta < 7 * 86400 then
+				week_users = week_users + 1;
+			end
+			if delta < 30 * 86400 then
+				month_users = month_users + 1;
+			end
+			if delta < 6 * 30 * 86400 then
+				half_year_users = half_year_users + 1;
+			end
+		end
+	end
+
+	-- Remove the properties if we couldn’t find a single active user.  It most likely means mod_lastlog isn’t in use.
+	if half_year_users == 0 and month_users == 0 and week_users == 0 then
+		week_users = nil;
+		month_users = nil;
+		half_year_users = nil;
+	end
+end
+
+add_task(86400, update_user_list);
+update_user_list();
+
 module:provides("http", {
 	default_path = "/.well-known/x-nodeinfo2";
 	route = {
@@ -54,9 +62,9 @@
 			local usage = {
 				users = {
 					total = total_users;
-					activeHalfyear = half_year_users;
+					activeWeek = week_users;
 					activeMonth = month_users;
-					activeWeek = week_users;
+					activeHalfyear = half_year_users;
 				};
 			};