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annotate mod_muc_markers/mod_muc_markers.lua @ 4024:95882b487ed2

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mod_muc_markers: Allow configuration of which marker to track, default to displayed
author Matthew Wild <mwild1@gmail.com>
date Tue, 19 May 2020 14:06:42 +0100
parents 45c5603a6c07
children 57b4cdeba318
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45c5603a6c07 mod_muc_markers: New module for server-side receipt tracking in MUCs
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1 -- Track messages received by users of the MUC
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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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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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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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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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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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47 -- Prevent stanza from reaching the room (it's just noise)
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48 return true;
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49 end);
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50
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51 -- Public API
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53 function get_user_read_marker(user_jid, room_jid)
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54 return muc_marker_map_store:get(user_jid, room_jid);
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55 end