File

+
−local id = require "util.id";
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−local jid = require "util.jid";
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−local set = require "util.set";
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−local st = require "util.stanza";
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−
+
−if module:get_host_type() ~= "local" then
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−	module:log("error", "mod_%s must be loaded as a regular module, not on Components", module.name);
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−	return
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−end
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−
+
−module:depends "track_muc_joins";
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−module:add_feature("https://modules.prosody.im/mod_" .. module.name);
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−
+
−local local_sessions = prosody.hosts[module.host].sessions;
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−
+
−module:hook_global("s2s-destroyed", function(event)
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−	local s2s_session = event.session;
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−	if s2s_session.direction == "outgoing" and s2s_session.from_host ~= module.host then
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−		return
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−	elseif s2s_session.direction == "incoming" and s2s_session.to_host ~= module.host then
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−		return
+
−	end
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−
+
−	local related_hosts = set.new({ s2s_session.direction == "outgoing" and s2s_session.to_host or s2s_session.from_host });
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−
+
−	if s2s_session.hosts then
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−		-- While rarely used, multiplexing is still supported
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−		for host, state in pairs(s2s_session.hosts) do if state.authed then related_hosts:add(host); end end
+
−	end
+
−
+
−	local ping_delay = module:get_option_number("ping_muc_delay", 60, 1);
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−
+
−	module:add_timer(ping_delay, function ()
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−		for _, user_session in pairs(local_sessions) do
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−			for _, session in pairs(user_session.sessions) do
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−				if session.rooms_joined then
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−					for room, info in pairs(session.rooms_joined) do
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−						local nick = info.nick or info;
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−						local room_nick = room .. "/" .. nick;
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−						if related_hosts:contains(jid.host(room)) then
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−							-- User is in a MUC room for which the s2s connection was lost. Now what?
+
−
+
−							-- Self-ping
+
−							-- =========
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−							--
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−							-- Response of <iq type=result> means the user is still in the room
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−							-- (and self-ping is supported), so we do nothing.
+
−							--
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−							-- An error reply either means the user has fallen out of the room,
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−							-- or that self-ping is unsupported. In the later case, whether the
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−							-- user is still joined is indeterminate and we might as well
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−							-- pretend they fell out.
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−								module:send_iq(st.iq({ type = "get"; id = id.medium(); from = session.full_jid; to = room_nick })
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−										:tag("ping", { xmlns = "urn:xmpp:ping"; }))
+
−								:catch(function(err)
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−									module:send(
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−										st.presence({ type = "unavailable"; id = id.medium(); to = session.full_jid; from = room_nick })
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−											:tag("x", { xmlns = "http://jabber.org/protocol/muc#user" })
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−												:tag("item", { affiliation = "none"; role = "none" })
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−													:text_tag("reason", err.text or "Connection to remote server lost")
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−												:up()
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−												:tag("status", { code = "110" }):up()
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−												:tag("status", { code = "333" }):up()
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−											:reset());
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−								end);
+
−						end
+
−					end
+
−				end
+
−			end
+
−		end
+
−	end)
+
−end);