-- Last User Interaction in Presence via Last Activity compatibility module

-- http://xmpp.org/extensions/xep-0319.html

-- http://xmpp.org/extensions/xep-0012.html

-- Copyright (C) 2014 Tobias Markmann

--

-- This file is MIT/X11 licensed.

local st = require "util.stanza";

local datetime = require "util.datetime";

local function on_presence(event)

	local stanza = event.stanza;

	local last_activity = stanza.name == "presence" and stanza:get_child("query", "jabber:iq:last") or false;

	local has_idle = stanza:get_child("idle", "urn:xmpp:idle:1");

	if last_activity and not has_idle then

		module:log("debug", "Adding XEP-0319 tag from Last Activity.");

		local seconds = last_activity.attr.seconds;

		local last_userinteraction = datetime.datetime(os.time() - seconds);

		stanza:tag("idle", { xmlns = "urn:xmpp:idle:1", since = last_userinteraction }):up();

	end

end

-- incoming

module:hook("presence/full", on_presence, 900);

module:hook("presence/bare", on_presence, 900);

-- outgoing

module:hook("pre-presence/bare", on_presence, 900);

module:hook("pre-presence/full", on_presence, 900);

module:hook("pre-presence/host", on_presence, 900);