-- MAM Subscriptions prototype
-- Copyright (C) 2015 Kim Alvefur
--
-- This file is MIT/X11 licensed.
local mt = require"util.multitable";
local st = require"util.stanza";
local xmlns_mamsub = "http://prosody.im/protocol/mamsub";
module:add_feature(xmlns_mamsub);
local host_sessions = prosody.hosts[module.host].sessions;
local weak = { __mode = "k" };
module:hook("iq-set/self/"..xmlns_mamsub..":subscribe", function (event)
local origin, stanza = event.origin, event.stanza;
if origin.mamsub ~= nil then
origin.send(st.error_reply(stanza, "modify", "conflict"));
return true;
end
origin.mamsub = xmlns_mamsub;
local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
if not mamsub_sessions then
mamsub_sessions = setmetatable({}, weak);
host_sessions[origin.username].mamsub_sessions = mamsub_sessions;
end
mamsub_sessions[origin] = true;
origin.send(st.reply(stanza));
return true;
end);
module:hook("iq-set/self/"..xmlns_mamsub..":unsubscribe", function (event)
local origin, stanza = event.origin, event.stanza;
if origin.mamsub ~= xmlns_mamsub then
origin.send(st.error_reply(stanza, "modify", "conflict"));
return true;
end
origin.mamsub = nil;
local mamsub_sessions = host_sessions[origin.username].mamsub_sessions;
if mamsub_sessions then
mamsub_sessions[origin] = nil;
end
origin.send(st.reply(stanza));
return true;
end);
module:hook("archive-message-added", function (event)
local user_session = host_sessions[event.for_user];
local mamsub_sessions = user_session and user_session.mamsub_sessions;
if not mamsub_sessions then return end;
local for_broadcast = st.message():tag("mamsub", { xmlns = xmlns_mamsub })
:tag("forwarded", { xmlns = "urn:xmpp:forward:0" })
:add_child(event.stanza);
for session in pairs(mamsub_sessions) do
if session.mamsub == xmlns_mamsub then
for_broadcast.attr.to = session.full_jid;
session.send(for_broadcast);
end
end
end);