view mod_delay/mod_delay.lua @ 2435:05248d5a7166

mod_delay: Only add delay to messages of type chat or groupchat (fixes #811)
author tmolitor <>
date Sun, 08 Jan 2017 06:26:21 +0100
parents 3b2c94ea0c2e
children 5e94061c1aa7
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local add_filter = require "util.filters".add_filter;
local remove_filter = require "util.filters".remove_filter;
local datetime = require "util.datetime";

local xmlns_delay = "urn:xmpp:delay";

-- Raise an error if the modules has been loaded as a component in prosody's config
if module:get_host_type() == "component" then
	error(" should NOT be loaded as a component, check out", 0);

local add_delay = function(stanza, session)
	if stanza and == "message" and stanza:get_child("delay", xmlns_delay) == nil then
		-- only add delay tag to chat or groupchat messages (should we add a delay to anything else, too???)
		if stanza.attr.type == "chat" or stanza.attr.type == "groupchat" then
			-- session.log("debug", "adding delay to message %s", tostring(stanza));
			stanza = stanza:tag("delay", { xmlns = xmlns_delay, from =, stamp = datetime.datetime()});
	return stanza;

module:hook("resource-bind", function(event)
	add_filter(event.session, "stanzas/in", add_delay, 1);

module:hook("pre-resource-unbind", function (event)
	remove_filter(event.session, "stanzas/in", add_delay);