Annotate

mod_throttle_presence/mod_throttle_presence.lua @ 4300:3f3b672b7616

mod_vcard_muc: Pass room object around instead of JID, hopefully fixing traceback More efficient to pass the object around instead of using the JID and looking up the object when needed. It seems in some (undetermined) cases get_room_from_jid(room.jid) is nil.
author Matthew Wild <mwild1@gmail.com>
date Tue, 15 Dec 2020 10:49:11 +0000
parent 1925:552faee596b7
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1 local filters = require "util.filters";
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2 local st = require "util.stanza";
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3
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4 module:depends("csi");
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6 local function presence_filter(stanza, session)
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7 if getmetatable(stanza) ~= st.stanza_mt then
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8 return stanza; -- Things we don't want to touch
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9 end
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10 if stanza._flush then
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11 stanza._flush = nil;
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12 return stanza;
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13 end
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14 local buffer = session.presence_buffer;
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15 local from = stanza.attr.from;
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16 if stanza.name == "presence" and (stanza.attr.type == nil or stanza.attr.type == "unavailable") then
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17 module:log("debug", "Buffering presence stanza from %s to %s", stanza.attr.from, session.full_jid);
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18 buffer[stanza.attr.from] = st.clone(stanza);
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19 return nil; -- Drop this stanza (we've stored it for later)
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20 else
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21 local cached_presence = buffer[stanza.attr.from];
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22 if cached_presence then
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23 module:log("debug", "Important stanza for %s from %s, flushing presence", session.full_jid, from);
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24 stanza._flush = true;
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25 cached_presence._flush = true;
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26 session.send(cached_presence);
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27 buffer[stanza.attr.from] = nil;
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28 end
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29 end
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30 return stanza;
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31 end
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33 local function throttle_session(event)
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34 local session = event.origin;
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35 if session.presence_buffer then return; end
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36 module:log("debug", "Suppressing presence updates to %s", session.full_jid);
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37 session.presence_buffer = {};
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38 filters.add_filter(session, "stanzas/out", presence_filter);
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39 end
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41 local function restore_session(event)
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42 local session = event.origin;
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43 if not session.presence_buffer then return; end
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44 filters.remove_filter(session, "stanzas/out", presence_filter);
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45 module:log("debug", "Flushing buffer for %s", session.full_jid);
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46 for jid, presence in pairs(session.presence_buffer) do
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47 session.send(presence);
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48 end
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49 session.presence_buffer = nil;
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50 end
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52 module:hook("csi-client-inactive", throttle_session);
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53 module:hook("csi-client-active", restore_session);