prosody-modules
57b4cdeba318
mod_muc_markers/mod_muc_markers.lua

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mod_muc_markers/mod_muc_markers.lua @ 4025:57b4cdeba318

mod_muc_markers: Prevent storage instead of broadcast Restores the ability to see how far others have read. Maybe this should be a setting?
author Kim Alvefur <zash@zash.se>
date Tue, 05 May 2020 21:50:35 +0200
parent 4024:95882b487ed2
child 4026:e3964f876b5d
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1 -- Track messages received by users of the MUC
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2
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3 -- We rewrite the 'id' attribute of outgoing stanzas to match the stanza (archive) id
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4 -- This module is therefore incompatible with the muc#stable_id feature
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5 -- We rewrite the id because XEP-0333 doesn't tell clients explicitly which id to use
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6 -- in marker reports. However it implies the 'id' attribute through examples, and this
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7 -- is what some clients implement.
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8 -- Notably Conversations will ack the origin-id instead. We need to update the XEP to
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9 -- clarify the correct behaviour.
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11 local xmlns_markers = "urn:xmpp:chat-markers:0";
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12
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13 local marker_element_name = module:get_option_string("muc_marker_type", "displayed");
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15 local muc_marker_map_store = module:open_store("muc_markers", "map");
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17 local function get_stanza_id(stanza, by_jid)
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18 for tag in stanza:childtags("stanza-id", "urn:xmpp:sid:0") do
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19 if tag.attr.by == by_jid then
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20 return tag.attr.id;
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21 end
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22 end
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23 return nil;
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24 end
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26 module:hook("muc-broadcast-message", function (event)
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27 local stanza = event.stanza;
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28
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29 local archive_id = get_stanza_id(stanza, event.room.jid);
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30 -- We are not interested in stanzas that didn't get archived
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31 if not archive_id then return; end
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32
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33 -- Add stanza id as id attribute
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34 stanza.attr.id = archive_id;
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35 -- Add markable element to request markers from clients
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36 stanza:tag("markable", { xmlns = xmlns_markers }):up();
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37 end, -1);
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38
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39 module:hook("muc-occupant-groupchat", function (event)
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40 local marker = event.stanza:get_child(marker_element_name, xmlns_markers);
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41 if not marker then return; end
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42
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43 -- Store the id that the user has received to
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44 module:log("warn", "New marker for %s: %s", event.occupant.bare_jid, marker.attr.id);
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45 muc_marker_map_store:set(event.occupant.bare_jid, event.room.jid, marker.attr.id);
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46
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47 end);
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48
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49 module:hook("muc-message-is-historic", function (event)
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50 local marker = event.stanza:get_child("received", xmlns_markers);
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51
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52 -- Prevent stanza from reaching the archive (it's just noise)
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53 if marker then
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54 return false
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55 end
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56 end);
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57
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58 -- Public API
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59
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60 function get_user_read_marker(user_jid, room_jid)
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61 return muc_marker_map_store:get(user_jid, room_jid);
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62 end