annotate mod_muc_notifications/mod_muc_notifications.lua @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parents ef752c5115f7
children
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1 -- mod_muc_notifications
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2 --
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3 -- Copyright (C) 2019 Marcos de Vera Piquero <marcos.devera@quobis.com>
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4 --
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5 -- This file is MIT/X11 licensed.
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6 --
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7 -- A module to notify non-present members of messages in a group chat
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8 --
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9
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10 local id = require"util.id"
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11 local st = require"util.stanza"
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12
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13 local use_invite = module:get_option_boolean("muc_notification_invite", false)
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14
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15 -- Given a stanza, compute if it qualifies as important (notifiable)
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16 -- return true for message stanzas with non-empty body
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17 -- Should probably use something similar to muc-message-is-historic event
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18 local function is_important(stanza)
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19 local body = stanza:find("body#")
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20 return body and #body
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21 end
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22
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23 local function handle_muc_message(event)
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24 -- event.room and event.stanza are available
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25 local room = event.room
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26 local stanza = event.stanza
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27 for jid, aff in pairs(room._affiliations) do
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28 if aff ~= "outcast" then
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29 local is_occupant = false
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30 for _, occupant in pairs(room._occupants) do
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31 if occupant.bare_jid == jid then
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32 is_occupant = true
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33 break
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34 end
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35 end
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36 if not is_occupant and is_important(stanza) then
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37 -- send notification to jid
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38 local attrs = {
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39 to = jid,
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40 id = id.short(),
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41 from = room.jid,
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42 }
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43 local not_attrs = {
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44 xmlns = "http://quobis.com/xmpp/muc#push",
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45 jid = room.jid,
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46 }
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47 local reason = "You have messages in group chat "..(room:get_name() or room.jid)
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48 local notification = st.message(attrs)
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49 :body(reason):up()
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50 :tag("notification", not_attrs):up()
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51 :tag("no-store", {xmlns = "urn:xmpp:hints"})
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52 local invite = st.message(attrs):tag("x", {xmlns = "http://jabber.org/protocol/muc#user"})
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53 :tag("invite", {from = stanza.attr.from})
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54 :tag("reason"):text(reason):up():up():up()
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55 :tag("notification", not_attrs):up()
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56 :tag("no-store", {xmlns = "urn:xmpp:hints"})
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57 module:log("debug", "notifying with %s", tostring(use_invite and invite or notification))
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58 module:send(use_invite and invite or notification)
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59 module:log("debug", "sent notification of MUC message %s", use_invite and invite or notification)
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60 end
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61 end
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62 end
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63 end
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64
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65 module:hook("muc-broadcast-message", handle_muc_message)
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66
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67 module:log("debug", "Module loaded")