view mod_muc_notifications/mod_muc_notifications.lua @ 4282:281a864e7472

mod_pubsub_feeds: Don't skip publishing items after an existing one I encountered a feed which was backwards, such that older entries were considered first and then it would skip newer entries. This may however run into trouble if the feed contains more items than what's persisted in pubsub.
author Kim Alvefur <zash@zash.se>
date Mon, 30 Nov 2020 15:17:29 +0100
parents ef752c5115f7
children
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-- mod_muc_notifications
--
-- Copyright (C) 2019 Marcos de Vera Piquero <marcos.devera@quobis.com>
--
-- This file is MIT/X11 licensed.
--
-- A module to notify non-present members of messages in a group chat
--

local id = require"util.id"
local st = require"util.stanza"

local use_invite = module:get_option_boolean("muc_notification_invite", false)

-- Given a stanza, compute if it qualifies as important (notifiable)
-- return true for message stanzas with non-empty body
-- Should probably use something similar to muc-message-is-historic event
local function is_important(stanza)
	local body = stanza:find("body#")
	return body and #body
end

local function handle_muc_message(event)
	-- event.room and event.stanza are available
	local room = event.room
	local stanza = event.stanza
	for jid, aff in pairs(room._affiliations) do
		if aff ~= "outcast" then
			local is_occupant = false
			for _, occupant in pairs(room._occupants) do
				if occupant.bare_jid == jid then
					is_occupant = true
					break
				end
			end
			if not is_occupant and is_important(stanza) then
				-- send notification to jid
				local attrs = {
					to = jid,
					id = id.short(),
					from = room.jid,
				}
				local not_attrs = {
					xmlns = "http://quobis.com/xmpp/muc#push",
					jid = room.jid,
				}
				local reason = "You have messages in group chat "..(room:get_name() or room.jid)
				local notification = st.message(attrs)
					:body(reason):up()
					:tag("notification", not_attrs):up()
					:tag("no-store", {xmlns = "urn:xmpp:hints"})
				local invite = st.message(attrs):tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
					:tag("invite", {from = stanza.attr.from})
					:tag("reason"):text(reason):up():up():up()
					:tag("notification", not_attrs):up()
					:tag("no-store", {xmlns = "urn:xmpp:hints"})
				module:log("debug", "notifying with %s", tostring(use_invite and invite or notification))
				module:send(use_invite and invite or notification)
				module:log("debug", "sent notification of MUC message %s", use_invite and invite or notification)
			end
		end
	end
end

module:hook("muc-broadcast-message", handle_muc_message)

module:log("debug", "Module loaded")