+
−module:set_global();
+
−
+
−local measure = require"core.statsmanager".measure;
+
−
+
−local disco_ns = "http://jabber.org/protocol/disco#info";
+
−
+
−local counters = {
+
−	total = measure("amount", "client_features.total");
+
−};
+
−
+
−module:hook("stats-update", function ()
+
−	local total = 0;
+
−	local buckets = {};
+
−	for _, session in pairs(prosody.full_sessions) do
+
−		local disco_info = session.caps_cache;
+
−		if disco_info ~= nil then
+
−			for feature in disco_info:childtags("feature", disco_ns) do
+
−				local var = feature.attr.var;
+
−				if var ~= nil then
+
−					if buckets[var] == nil then
+
−						buckets[var] = 0;
+
−					end
+
−					buckets[var] = buckets[var] + 1;
+
−				end
+
−			end
+
−			total = total + 1;
+
−		end
+
−	end
+
−	for bucket, count in pairs(buckets) do
+
−		if counters[bucket] == nil then
+
−			counters[bucket] = measure("amount", "client_features."..bucket);
+
−		end
+
−		counters[bucket](count);
+
−	end
+
−	counters.total(total);
+
−end)