view mod_mamsub/mod_mamsub.lua @ 3492:f59334da6df9

mod_conversejs: Show fallback text if converse.js fails to load (thanks MattJ) This can happen if javascript is enabled but 3rd party resources are blocked, or some other error happened.
author Kim Alvefur <zash@zash.se>
date Tue, 19 Mar 2019 19:43:13 +0100
parents 0697fbef9134
children
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-- 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);