local id = require "util.id";
local jid = require "util.jid";
local set = require "util.set";
local st = require "util.stanza";
module:depends "track_muc_joins";
module:add_feature("https://modules.prosody.im/mod_" .. module.name);
local local_sessions = prosody.hosts[module.host].sessions;
module:hook_global("s2s-destroyed", function(event)
local s2s_session = event.session;
if s2s_session.direction == "outgoing" and s2s_session.from_host ~= module.host then
return
elseif s2s_session.direction == "incoming" and s2s_session.to_host ~= module.host then
return
end
local related_hosts = set.new({ s2s_session.direction == "outgoing" and s2s_session.to_host or s2s_session.from_host });
if s2s_session.hosts then
-- While rarely used, multiplexing is still supported
for host, state in pairs(s2s_session.hosts) do if state.authed then related_hosts:add(host); end end
end
for _, user_session in pairs(local_sessions) do
for _, session in pairs(user_session.sessions) do
if session.rooms_joined then
for room, info in pairs(session.rooms_joined) do
local nick = info.nick or info;
local room_nick = room .. "/" .. nick;
if related_hosts:contains(jid.host(room)) then
-- User is in a MUC room for which the s2s connection was lost. Now what?
-- Self-ping
-- =========
--
-- Response of <iq type=result> means the user is still in the room
-- (and self-ping is supported), so we do nothing.
--
-- An error reply either means the user has fallen out of the room,
-- or that self-ping is unsupported. In the later case, whether the
-- user is still joined is indeterminate and we might as well
-- pretend they fell out.
module:send_iq(st.iq({ type = "get"; id = id.medium(); from = session.full_jid; to = room_nick })
:tag("ping", { xmlns = "urn:xmpp:ping"; }))
:catch(function(err)
module:send(
st.presence({ type = "unavailable"; id = id.medium(); to = session.full_jid; from = room_nick })
:tag("x", { xmlns = "http://jabber.org/protocol/muc#user" })
:tag("item", { affiliation = "none"; role = "none" })
:text_tag("reason", err.text or "Connection to remote server lost")
:up()
:tag("status", { code = "110" }):up()
:tag("status", { code = "333" }):up()
:reset());
end);
-- TODO do this with some delay?
end
end
end
end
end
end);