File

plugins/mod_lastactivity.lua @ 12115:94de6b7596cc

mod_tombstones: Remember deleted accounts #1307 Presence subscriptions are normally revoked on account deletion, which informs the contact. Sometimes this notification gets lost e.g. due to s2s problems. The accounts JID may also be present e.g. in MUC affiliations, chat group member lists, pubsub subscriptions or other systems. These may grant privileges which would fall to someone who creates the same account again, which this module is meant to prevent.
author Kim Alvefur <zash@zash.se>
date Thu, 23 Dec 2021 14:08:20 +0100
parent 10750:ff087f2d4cb6
child 12977:74b9e05af71e
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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local st = require "util.stanza";
local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
local jid_bare = require "util.jid".bare;
local jid_split = require "util.jid".split;

module:add_feature("jabber:iq:last");

local map = {};

module:hook("pre-presence/bare", function(event)
	local stanza = event.stanza;
	if not(stanza.attr.to) and stanza.attr.type == "unavailable" then
		local t = os.time();
		local s = stanza:get_child_text("status");
		map[event.origin.username] = {s = s, t = t};
	end
end, 10);

module:hook("iq-get/bare/jabber:iq:last:query", function(event)
	local origin, stanza = event.origin, event.stanza;
	local username = jid_split(stanza.attr.to) or origin.username;
	if not stanza.attr.to or is_contact_subscribed(username, module.host, jid_bare(stanza.attr.from)) then
		local seconds, text = "0", "";
		if map[username] then
			seconds = string.format("%d", os.difftime(os.time(), map[username].t));
			text = map[username].s;
		end
		origin.send(st.reply(stanza):tag('query', {xmlns='jabber:iq:last', seconds=seconds}):text(text));
	else
		origin.send(st.error_reply(stanza, 'auth', 'forbidden'));
	end
	return true;
end);

module.save = function()
	return {map = map};
end
module.restore = function(data)
	map = data.map or {};
end