view mod_mamsub/mod_mamsub.lua @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
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);